关于since和before
问题描述：
关于since和before
It was two years___he came back from abroad.
A.since B.that C.when D.before
答
答案：D句意：过了两年后他就回国了.解析：考查句型： It was + 一段时间+ before 过了多久就……例：It wasn’t two years before he left the country. 还没到两年他们就 离开了那国家.It was a long time b...