Unit 13 We're trying to save the earth!Section A (3a-3b) 练习题（含答案）

Unit 13 Section A (3a-3b)
一、用括号内所给单词的适当形式填空。
1．We should prevent people from catching _________(shark) for their fins.
2．Smoking is ___________(harm) to yourself and people around you.
3．According to ___________(science) studies，eating fruit is good for health.
4．The government did something to stop the _________(sell) of wild animals.
5．Elephants are one of the ___________(strong) animals on land.
二、用方框中所给单词的适当形式填空。
endanger, trade, environment, law, industry
1．With the development of society，some _____ are canceled and some new ones are made.
2．I followed my friend's advice and joined in a(n) ____________ protection project last year.
3．Millions of tons of tea ____________ between the two countries each year.
4．5G technology influenced many ____________ and encouraged the appearance (出现) of many new products.
5．We should try our best to save the ____________ animals.
三、单项选择。
1. I can't stand people who are ________ to little animals.
A．worried B．friendly C．cruel D．careless
2. In our school library there ________ a number of books and the number of them ________ growing larger and larger.
A．is；are B．has；is C．are；is D．have；are
3. We should do something to stop people ________ the sharks' fins.
A．taking down B．taking off C．cutting down D．cutting off
4. — Alice，have you finished learning the whole book
— Not yet. So far，I ________ six units.
A．learned B．learning C．have learned D．had learned
5. Uncle Wang is ________ humorous ________ helpful，so everyone likes him.
A．neither；nor B．not only；but also C．either；or D．both；or
四、阅读理解。
Doing research before you sort your waste can make a difference. Here are a few ways to help you do it better.
Plastic bottles and their caps They melt (熔化) at different temperatures. So in recycling factories，workers deal with caps and bottles differently. You may squeeze (挤压) the air out of the bottles before you recycle them.
Plastic bags They cause a lot of trouble in the recycling process. If you have a lot of them，you can turn to programs that mainly deal with them. Or you may just put them in the dry garbage bin.
Pizza boxes They aren't recyclable because there is oil on them. There aren't just pizza boxes. Many food boxes are the same as the pizza boxes. Paper napkins, plates and towels are non-recyclable for this reason.
Wet waste It's also known as “kitchen waste”．You don't want the things, but some animals can eat them. You don't need to recycle them. Instead, use them to feed animals.
21.Why do workers deal with plastic bottles and their caps differently when recycling
A．Because they have different recycling places.
B．Because they have different recycling process.
C．Because they have different melting temperatures.
D．Because they have different influences on the environment.
2. How can we deal with plastic bags
A．We can get the oil out of them.
B．We can squeeze the air out of them.
C．We can put them in the dry garbage bin.
D．We can put them in the non-recyclable bin.
3. Which of the following are non-recyclable
①Plastic bottles.　②Paper napkins. ③Plates and towels.　④Clean paper.
A．①③　 B．②③　 C．①②　 D．③④
4. How should we deal with wet waste
A．Recycle it. B．Make it dry. C．Put it in bins. D．Feed it to animals.
5. What can we learn from the text
A．We can't recycle all the rubbish. B．It's quite easy to recycle pizza boxes.
C．Plastic bottle caps are non-recyclable. D．We can't use the kitchen waste again.
五、根据汉语意思完成下列句子。
1．你对食物链了解得多吗？
Do you know much about ____ ______ ______？
2．你们能够在这些大楼顶上发现很多红旗吗？
Can you find many red flags ____ ____ ____ ___ these buildings
13．我不认识这位科学家，但是听说过她。
I don't know the scientist，but I have _______ ____ her.
4．我们应尽最大的努力保护海洋生态系统。
We should try our best to protect _____ _______ __________．
5．这个国家35岁至44岁之间的人口数量将在未来15年内减少15%。
_____ _________ ____ people in this country between the ages of 35 and 44 will _________ ____ 15 percent over the next 15 years.
答案
一、
1. sharks
2. harmful
3. scientific
4. sale
5. strongest
二、
1. laws
2. environmental
3. are traded
4. industries
5. endangered
三、
1-5 CCDCB
四、
1-5 CCBDA
五、
1. the food chain
2. at the top of
3. heard of
4. the ocean's ecosystem
5. The number of fall/drop by