题目内容
He met many problems ______ he was going over his lessons.
A.before | B.as soon as | C.since | D.while |
D
翻译:当他正在复习他的功课时他遇见了很多困难
A在。。。。之前
B一。。。。就
C自从
D当。。。。时
故选D
A在。。。。之前
B一。。。。就
C自从
D当。。。。时
故选D
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