题目内容
选择正确答案。-- What's ______ now?
-- Tom is singing. Can you hear?
A. happens B. happening C. happened
答案:B
解析:
解析:
答案:B |
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题目内容
选择正确答案。-- What's ______ now?
-- Tom is singing. Can you hear?
A. happens B. happening C. happened
答案:B |