冀教版英语九年级上册课时作业：Lesson 25　Let’s Do an Experiment!（含答案）

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Lesson 25　Let’s Do an Experiment!
Ⅰ.根据句意及首字母或汉语提示完成句子
1.Trees break the 　　　　(力量) of the wind.
2.The boy always has some simple and easy　　　　(方法).
3.Linda’s answer to the question is 　　　　 (正确的).
4.It’s raining outside. Please put on your r　　　　, Jim.
5.In the lab, a chemistry teacher is teaching the students to do an e 　called how to get oxygen(氧气).
Ⅱ.用所给单词的适当形式填空
6.Judy is tall enough 　　　　(reach) the ceiling.
7.To keep healthy, we should exercise in a　　　　 (science) way.
8.Just now we 　　　　 (conclude) that we would finish the work in five groups.
9.We have 　　　 　(discover) that he is careless in his work.
10.The old man was excited and held his hand 　　　　(tight).
Ⅲ.用方框中所给单词或短语的适当形式填空
11.Please don’t 　　　　the box 　　　　 because the things in it are fragile(易碎的).
12.The teacher asks me to fill the 　　　　with water.
13.High blood 　　　　　　　　kills many people.
14.We should take action to stop the factories 　　　　　　.　　wastewater.
15.Please 　　　　your hand 　　　　the heat quickly. It is dangerous.
Ⅳ.单项选择
(　)16.　　　 the cup upside down, and you can find where it was made.
A.Push B.Turn C.Bring D.Pour
(　)17.He is sure 　　　his theory. Nobody can change his mind.
A.of B.at C.with D.for
(　)18.—Can you tell me the 　　　time, Gina My watch doesn’t work.
—Sure. It’s 5 o’clock.
A.correct B.different C.boring D.difficult
(　)19.I won’t force anybody 　　　anything.
A.do B.does C.to do D.doing
(　)20.You can work out the maths exercise in two different 　　　.
A.plans B.methods C.answers D.questions
Ⅴ.连词成句
21.interesting, it’s, science, to, experiments, do
　 .
22.what, you, guess, will, can, happen
　
23.to, scientific, use, find, let’s, methods, the, truth
　 .
24.are, we, of, our, theory, sure
　 .
25.concluded, what, you, have
　
Ⅵ.词语运用
　　 阅读下面短文,在空白处填入一个适当的单词(有提示词的,填入所给单词的正确形式)。
Today I did 26.　　　　 experiment. It was interesting. First, I 27.　　　　(fill) a jar with water. I covered the top with a piece of cardboard and 28.　　　　(hold) it there. Then I 29.　　　　(turn) the jar upside down and took my hand
30.　　　　 the cardboard. To my 31.　　　　(surprised),
the water stayed in the jar. Why 32.　　　　 the force of the air is strong enough to keep the water inside the jar. Through experiments, we can test 33.　　　　(theory). We call them 34.　 　　　(science) methods. From this experiment, I became 35.　　　　(much) interested in science than before.
Ⅶ.阅读理解
Lab work is fun but you must be careful. Listen carefully when your teacher reads and explains the rules before your first lab lesson.
(　)36.You must know the LAB RULES 　　　the first lab lesson.
A.before B.since
C.during D.after
(　)37.It is necessary for you to 　　　before every experiment.
A.read all instructions carefully
B.take enough food and drinks
C.smell chemicals immediately
D.talk with your classmates
(　)38.If you are not sure how to use any pieces of apparatus, 　　　.
A.read the rules carefully
B.try them again and again
C.ask your teacher for help
D.return all apparatus to the places where they were
(　)39.The underlined word “spill” means “　　　” in Chinese.
A.照射 B.伤害 C.摔下 D.溅出
(　)40.When you are in the science lab, you mustn’t 　　　.
A.be careful in order to prevent injury
B.listen carefully when your teacher explains the rules
C.taste chemicals without the teacher’spermission
D.throw waste materials into proper waste baskets
答案
force
methods
correct/right
raincoat
experiment
to reach
scientific
concluded
discovered
tightly
Turn upside down
Jar
pressure
prering out
take off
B
A
A
C
B
It’s interesting to do science experiments
Can you guess what will happen
Let’s use scientific methods to find the truth
We are sure of our theory
What have you concluded
an
filled
held
turned
off
surprise
Because
theories
Scientific
More
A
A
C
D
C
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