When you are going to put out a fire, you （）
A. must be careful
B. should keep air away from it
C. must know it is dangerous
D. should cover it with water
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At first, the speaker was referring to the problem of pollution in the country, but halfway in her speech, she suddenly ______ to another subject.
A. committed
B. switched
C. favoured
D. transferred
W: Look at this pink watch. It looks great, doesn’t it And it’ s only $ 20.M:（）
A. It’ s only twenty dollars. God knows it.
B. I don ’ t want to look at it. After all, it’ s a watch.
C. The price is good. But I want to buy a more expensive watch.
D. How is it possible that a watch only cost us $ 20
How did people begin to use fire（）
A. Not everybody knows how people began to use fire.
B. Nobody knows how to make a fire.
C. It is an Australian who started a fire.
D. We are not sure how people began to use fir
63（）
A. appeared
B. felt
C. seemed
D. sounded
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