2026届高考英语二轮复习：语法填空课件(共38张PPT)

(共38张PPT)
Our National Parks
2025年完胜高考语法填空
(1篇)
Our National Parks
Among the greatest treasures of the United States are its national parks. These parks contain an amazing variety of natural 1.________(wonder), including plants, wildlife, rock formations, geysers(间歇喷泉), 2._______ waterfalls. More than 50 national parks attract visitors every year. Some parks are quite large. Big Bend National Park in west Texas encompasses(包含) more than 800,000 acres(英亩) of the Chihuahuan Desert along the United States–Mexico border.
Our National Parks
wonders
一
and
Famous 3.______ its many different environments, 4.______ park offers sharp contrasts in wilderness scenery. The Rio Grande curves through the park in a big bend, 5._________(creat) deep canyons(峡谷). Rugged(崎岖难行的) mountains, a desert plain, and unusual rock formations make up the park’s landscape. Big Bend is noted for 6._______(it) rare forms of animal and plant life, such as roadrunners(走鹃鸟) and prickly pears(仙人果).
for
creating
its
the
Archaeologists have found and studied pictographs (painted art石壁画) and petroglyphs (carved art) on
rock walls and artifacts(手工艺品) here that are nearly 10,000 years old. They reveal information about early
Native American cultures and 7._______ life may have been like long ago.
what
The people who take care of national parks and who guide visitors through the parks are known as park rangers(护林员). Park rangers at Big Bend tell visitors how the area 8.___________(change) over thousands of years.
People who like working 9.__________(outdoor) and respect nature often become park rangers. Many park rangers enjoy 10.__________(read) about nature and studying the sciences.
outdoors
has changed
reading
The Science of Hot-Air Balloons
2025年完胜高考语法填空
(5篇)
Pauline
The Science of Hot-Air Balloons
The Science Behind How Hot Air Balloons Work
How Do Hot Air Balloons Work
Since the rst hot-air balloon was launched in 1783, few things have changed about how they y. However, some new 1.__________(difference) have made ballooning a 2.________(safe) activity enjoyed by many people worldwide.
In the past hot-air balloons were always made out of linen(亚麻布) and paper. Today most are made of nylon(尼龙). Long pieces of nylon, 3._______(call) gores, are stitched together to create the balloon. Balloonists use nylon because it is a thin and light material. Also, it cannot be damaged by heat.
The Science of Hot-Air Balloons
differences
二
safer
called
Heat is the basic ingredient needed for ballooning.
As air becomes hotter, tiny particles of matter move faster and faster. As the balloon lls with warmer particles, it begins to rise. This is 4.________ the air inside is lighter than the dense air 5.___________(surround) the balloon.
6.______ is the warmer air particles that allow the balloon to oat above the cooler air.
surrounding
because
It
How the air is heated to in ate(使膨胀) the hot-air balloon has changed a great deal since the early days of ballooning. Back in 1783 re from damp straw and wool
heated the air as the balloon remained anchored(固定的) to the ground. 7.________(usual), a brave man or woman and a companion would climb into the basket, cut the line, 8.______ soar into the air.
and
Usually
Now balloonists use propane(丙烷)—the same gas used in most outdoor grills(烤架)—instead of straw. For hot-air balloons, it is piped from a tank to metal tubes. Once there, a small re heats up the tubes and the propane. When the propane ame is released, it creates
hot air that lls the inside of the hot-air balloon.
Besides propane, another gas that could be used is hydrogen. Hydrogen is a gas that has no odor, color, or taste and 9._______(burn) very easily. One advantage of hydrogen gas is that it does not need to be heated. However, hydrogen is expensive, so it is mostly used for
balloons during scienti c studies. These are studies designed to gather information that will help scientists.
Whether for science 10._______ sport, more people than ever are taking to the air in balloons.
burns
or
Up in the Air:
The story of Balloon Flight
2025年完胜高考语法填空
(3篇)
Pauline
Saturday promises to be fair, with no high winds, no storms. It’s a perfect day for 1.__________(balloon). Members of the balloonist club turn out early and set to work. Fans blow air into the balloons. 2.________(tongue) of orange ame shoot out of roaring gas burners, 3.________(heat) air to make the balloons rise. The balloons in ate and stand up. Pilots climb into their baskets, the ground crews let go of the ropes, and it’s up, up, and away.
Up in the Air:
The story of Balloon Flight
ballooning
三
Tongues
heating
A balloon oats along, silent as 4.______ cloud, until a pilot turns on the burners to heat air inside and gain altitude(海拔高度). Balloons cannot 5.__________(steer)
(驾驶). They travel only where the winds carry them. By changing altitude, though, a pilot may nd a different wind, going 6._____ a different direction. A chase crew follows on land to bring balloonists and balloons home at journey’s end.
a
be steered
in
Today thousands of people in many parts of the world belong to balloon clubs. Their sport was invented more than 200 years ago by a handful of people 7.______ willingly risked their lives ying the balloons they had built.
who
The Story of Ballooning
People have always dreamed of soaring(翱翔) like a bird or oating like a cloud. Over several hundred years a few people thought they knew how to do this. They theorized(建立理论) that a certain kind of big balloon might lift 8.______(they) up. The balloon would be lighter than the air around it, and it would oat in air 9._____ a boat oats in water. But no one managed to make such a balloon until 1783 when two French brothers 10.______(build) and launched the world’s rst hot-air balloon. Their names were Joseph and Etienne Montgol er.
them
as
built
The World’s First Balloon Flight
Hot smoky(冒烟的) air rising from a re had given Joseph Montgol er an idea. Perhaps such air would make
a balloon rise. 1.______(use) small balloons Joseph found that it did.
After many experiments 2.______ brothers built a balloon that was about 30 feet across and 38 feet tall. It had a 3._______(wood) frame at the base and was made of linen 4._______(back) with paper. On June 5, 1783, near the city of Lyons, France, the Montgol ers built a huge re of damp straw and wool. Hot air poured into the base of the balloon. As a small crowd watched in amazement, the balloon stirred, swelled, and nally rose upright.
Using
the
wooden
四
backed
Eight men were holding the balloon down. At a signal they let go. It rose some 6,000 feet into the air and stayed aloft(在空中) for ten minutes, landing 5.________(gentle)
in a nearby vineyard(葡萄园). This was the world’s rst public balloon ight.
gently
A Lighter-than-Air Balloon
Meanwhile in Paris, Professor Jacques A. C. Charles had designed a lighter-than-air balloon. He lled his balloon with a newly discovered gas called hydrogen, 6.______ weighed much less than air.
On August 27, 1783, Professor Charles launched his balloon at 5 P.M. As a crowd watched, it rose 3,000 feet and disappeared into the clouds.
which
Forty- ve minutes later the balloon came down outside a village 15 miles away. The villagers,
who had never heard of such a thing 7.______ a balloon,
thought a monster had fallen out of the sky. As it
bounced(跳跃) toward them, they attacked it with pitchforks(干草叉). When at last the monster lay still, men tied it to a horse’s tail and 8.__________(drag) it through the mud to make sure it was dead.
as
dragged
Now there were two ways to send balloons aloft:
with hot air and with hydrogen. The res were messy
and dangerous, but hydrogen took a lot of time to make.
Nevertheless, most of the early ights were made with hot-air balloons.
The First Passenger Balloons
The rst passengers 9.______(go) up in a balloon were a trio(三人一组) of animals—a duck, a rooster, and a lamb. On September 19, 1783, they traveled in a wicker(枝条编的) basket, or gondola(吊篮), attached 10._____ a balloon. After a short ight, the air in the balloon cooled and the passengers drifted(飘) safely to Earth. Their ight showed that it was possible to breathe while oating a few thousand feet above Earth.
to go
to
It was now time for 1.________(human) to risk ballooning. A daring young French chemist was the rst. On October 15, 1783, Fran ois Pil tre de Rozier went up 100 feet. He was anchored(把…...系住) 2.______ the ground by a long rope called a tether(系绳；拴链). His balloon carried a big metal pan under 3.______(it) mouth. A re in the pan sent hot air into the balloon. The ight was a success. After that de Rozier made many tethered ights to nd out how much straw and wool he needed to burn for each hour he stayed in the air.
humans
五
to
its
By November 21, de Rozier was ready to make the rst untethered ight. A huge crowd gathered to watch. The giant balloon lled, and at 1:54 P.M., de Rozier and a
companion were up, up, and away. When the balloon was
200 feet in the air, the pair took off their hats and bowed to those below. Then they sailed off
over Paris. The travelers ew for 25 minutes and covered about ve miles before 4.__________(land) in a eld outside the city.
landing
Daring Balloonists
Between 1783 5.______ 1785, many men, and some women, went up in balloons. Some went for sport. 6._______(other), more daring(勇于冒险的), wanted to do what no one had done before. Jean-Pierre Blanchard was one of these. Blanchard wanted to cross the English Channel from England to France.
On January 7, 1785, the wind was blowing in
the right direction over the cliffs of Dover. Blanchard
and his American friend John Jefferies lled their balloon with hydrogen, climbed in, and set off for France.
and
Others
The rst half of the trip went 7.________(smooth), but then the balloon began leaking gas. The water came closer and closer. 8.__________(lighten) the load, they threw everything overboard(从船上落入水中)—their bags of sand, food and drink, anchors. They were still sinking. Finally they 9.________(strip) and threw
their clothes overboard, 10.________(save) only their cork life jackets.
smoothly
To lighten
saving
stripped
The weather changed. The air grew 1.________(warm), heating the gas. The balloon rose, and they sailed over the French coast, landing in a forest 2._______ they were soon rescued.
On January 9, 1793, Blanchard made the rst ight in North America, 3._______(take) off from Philadelphia and carrying out scienti c experiments 4._____ 5,000 feet. He brought back sealed bottles of air that showed there was 5.______(little) oxygen at that height than at sea level. He also measured his heartbeat and found 6._____ was faster. At sea level it beat 84 times a minute; at 5,000 feet it beat 92.
warmer
六
where
taking
at
less
it
In the years ahead, daring balloonists would keep
setting records, 7._______ the chief discoveries were made in 1783, when a handful of people who dreamed of ying up, up, and away, made the dream come true.
but
Why a Balloon Rises and Floats
When you place a block of wood in water, it takes
up space, pushing some of the water aside. As the wood pushes against the water, the water pushes back. This
upward force is called buoyancy(浮力). Buoyancy is the force that keeps things a oat.
A hot-air balloon rises and oats in 8.______ ocean of air for the same reason that the block of wood oats
in water. It has buoyancy.
an
Others
Like all matter, air is made of tiny particles called
molecules. When air is heated, its molecules spread out
and move faster. When the air inside a balloon is heated,
some of the molecules inside the balloon 9.________(force) out. The air inside becomes thinner, or less dense. It weighs less than before, but it takes up the same amount of space. As a result, the air inside the balloon weighs less than an equal amount of outside air. Buoyancy 10._______(carry) the balloon up.
carries
are forced
Some gases are lighter than air because the molecules(分子) themselves are less dense. One of these
is hydrogen, the lightest gas known. However, it is a
dangerous gas that can burn and explode. That is why balloonists today use helium(氦), which is slightly heavier but does not burn or explode. Helium is the gas used in party balloons.