唧咕阿几
春芽
共回答了15个问题采纳率:73.3% 举报
1.When I went out it happened___A________.
A.to rain B.rain C.to be rain D.raining
当我出去的时候突然下雨了
happen to do sth
2.Hurry up!He is sure _B_____for us.
A.to wait B.to be waiting C.waiting D.being waited
to be doing
不定式现在进行时
be sure to do
1年前
7