B
since 自从……
固定句型：It's a long time since +一般过去时
It一撇s a long time _____ I saw him last time.
It一撇s a long time _____ I saw him last time.
A.after B.since C.before D.when
A.after B.since C.before D.when
英语人气：370 ℃时间：2019-12-11 08:11:15
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