(8) 语法填空练习

Passage (8)

There are two main reasons 1 the temperature of the air is always 2 change）. One reason is that the air around you moves in from somewhere else . Air usually moves in large bodies 3 (call) air masses. Some air masses move in from the north. These air masses usually have cold air that cause the temperature 4 (drop). Air masses also move in from the south. They usually have 5 (warm) air that causes the temperature to rise. Temperature changes during the day or night can be great 6 small. This depends partly 7 how many clouds are in the sky. 8 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 heat. The temperature usually does not drop much during such a night. When there are many clouds during 10 day, some of the sun's energy will not reach the earth. The temperature usually does not rise much on such a day.

Passage (8)1. why 2.changing 3.called 4.to drop 5.warmer 6. or 7.on 8.When 19.its 10.the

高中英语语法填空专项训练 第 1 页