问题
选择题
It will be a long time Mr Black back from abroad.
A．before;comes
B．since;has come
C．before;will come
D．after;will come
答案
答案：A
before 在句中意为“……才……”，后一空考查时间状语从句，用现在时表将来。
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It will be a long time Mr Black back from abroad.
A．before;comes
B．since;has come
C．before;will come
D．after;will come
答案：A
before 在句中意为“……才……”，后一空考查时间状语从句，用现在时表将来。