It一撇s a long time _____ I saw him last time.A.after B.since C.before D.when

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It一撇salongtime_____Isawhimlasttime.A.afterB.sinceC.beforeD.whenIt一撇salongtime_____Isawhimlasttime.A.

It一撇s a long time _____ I saw him last time.A.after B.since C.before D.when
It一撇s a long time _____ I saw him last time.
A.after B.since C.before D.when

It一撇s a long time _____ I saw him last time.A.after B.since C.before D.when
B
since 自从……
固定句型:It's a long time since +一般过去时

B 距离我上次见到他已经很久了 since自从