题目内容
仔细阅读下面的短文,文中共有10个空格。请根据每小题括号内的具体要求完成语法填空,例如正确词性,词形变化等。
There are two main reasons 1 (关系代词或关系副词) the temperature of the air is always 2 (change的正确形式).One reason is that the air around you moves in from somewhere else.Air usually moves in large bodies 3 (call 的正确形式) air masses.Some air masses move in from the north.These air masses usually have cold air that cause the temperature 4 (drop的正确形式).Air masses also move in from the south.They usually have 5 (warm的正确形式) air that causes the temperature to rise.
Temperature changes during the day or night can be great 6 (连词)small.This depends partly 7 (介词) how many clouds are in the sky. 8 (连词)there are many clouds during the night, they act like tile covers on your bed.They blanket the earth and keep the air from losing much of 9 (代词)heat.The temperature usually does not drop much during such a night.When there are many clouds during 10 (冠词)day, some of the sun’s energy will not reach the earth.The temperature usually does not rise much on such a day.
解析:
why, changing, called, to drop, warmer, or, on, When, its, the