How ________ it is raining now!

1. A.
   heavy
2. B.
   heavier
3. C.
   heavily
4. D.
   most heavy

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完形填空

　　There is a family of ants 1 live under a tree in front of our house, 2 I don't know 3 they got there.

　　They work hard all day long 4 and leaving their nest and looking for food. 5 of them seems lazy. They are very friendly toward one 6 . I like them very much and often go to 7 them home every day.

　　One day I went to see the ants just 8 a big rain. They were busy 9 earth in their mouths to stop up the entrance of the nest. Just then it started 10 . Soon it rained so 11 that I rushed 12 into the house. I thought, “My goodness! The ants will 13 be drowned.”

　　As soon as the rain 14 , I went out to see the ants. To my surprise, they were still alive and as 15 . The mud at the entrance of the nest had 16 and they were already busy 17 it away.

　　It was dark. The people who had been outside 18 the cool air had already gone home. I thought that the ants would be tired 19 their day-long work and would go to bed too. But when I shined my flashlight 20 their nest, they were found still working silently.

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