He met problems ______ he was going over his lessons. [ ]A.before B.as soon as C.since D.while -九年级英

题目简介

He met problems ______ he was going over his lessons. [ ]A.before B.as soon as C.since D.while -九年级英

题目详情

He met problems ______ he was going over his lessons.
[     ]
A.before
B.as soon as
C.since
D.while
题型:单选题难度:中档来源:河北省期末题

答案

D

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