问题

He met many problems ________ he was going over his lessons. [ ]

A: before
B: as soon as
C: since
D: while

正确答案是：

标签： he , many , met

同类题型

What are you going to do this weekend?—– I _____ yet.

He said that I would go abroad next month, ______?

That is a picture ______ Lucy.[ ]

They won’t make new problems _________ you.[ ]

It will me too much time to read this book.