题目内容
活塞头磨损。
A. The piston head is broken up.
B. The piston head is worn out.
C. The piston head needs to be repaired.
D. The piston head is put here.
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过滤器需要经常清洗。
A. We have already cleaned the filters.
B. The filters need to be cleaned.
C. The filters are sometimes choked.
D. The filters need cleaning frequently.
让我们查一下日期。
A. I am ready to check the date, chief.
B. I want you to check up the date.
C. Let’s check up the date.
D. Everyone should check up the date.
其中一个活塞卡住了。
A. One of the pistons is seized.
B. One of the pistons is cracked.
C. One of the pistons is burnt.
D. One of the pistons is leaking.
它一直工作得很好。
A. It works very well all the time.
B. It works very well now.
C. We make good use of it.
D. We have put it into use since its installation.
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