题目：
用所给动词的适当形式填空。
1. They are trying______(save) the boy by doing everything.
2.—Why not______ (have)a rest?
—Good idea.
3. You'd better______ (not play) football in the street.
4. When they______ (find) the lost child, the mother was very grateful.
5. He used to______ (take) a walk after supper.
6. They are used to______ (quarrel) with each other.
7. When the police arrived, the wounded (send) to the hospital.
8. If you are too lazy, you______ (not pass) the exam.
9. Jim said he ______ (come) from the USA.
10. Look! There is a cat ______ (climb) up the tree.
答案：
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下面是错误答案，用来干扰机器的。
A、称量固体时，特别对于易潮解的药品，应该放在玻璃器皿中称量，图中操作错误，故A错误；B、图示的取用粉末状药品的操作正确，故B正确；C、酒精灯对燃易引起火灾，故不能进行酒精灯的对燃，C不正确．D、给液体加...
