问题
选择题
—What do you do when it _____?
—I often stay at home and read books.[ ]
A. raining
B. rain
C. rains
D. is rains
答案
答案：C
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—What do you do when it _____?
—I often stay at home and read books.[ ]
A. raining
B. rain
C. rains
D. is rains
答案：C