摘要：The discovered the black holes in the space years ago.
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【小题1】She just_ _ that people in the west have 12 star signs.
【小题2】 My father ______ to celebrate my birthday with me several times but never did it.
【小题3】If I have time, I my grandparents in the countryside this weekend.
【小题4】 My penfriend to my e-mail every week.
【小题5】一Can you hear some students singing in the hall?
一Yes. Our school _________ a red-song competition there. 查看习题详情和答案>>