70. When I woke up at six, I heard somebody k_________(hit sth.)on my door.
B.选词填空 用方框中所给词语的适当形式填空,使短文正确、通顺、连贯.(每词限用一次)。(共10小题,每小题1分,计10分)
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When the world was very young, people 71 only in hot places. They did not live in cold places because they could not 72 warm there.
At first men did not know how 73 a fire. Sometimes trees were 74 by lightning. Then a fire was started. People took some of the fire near their homes. A fire was very 75 for three reasons. It kept them warm. Wild (野蛮的) animals were 76 when they saw it. And when food was cooked, it tasted much 77 .
When they had a fire, they did not let it stop 78 . If it 79 , they could not start it again. They had to wait for lightning to start another fire. Sometimes they had to wait for years.
Now fire is useful in our daily life , but we should be 80 with it .