问题

It’s a long time ______I saw you last.— And what is a pity now that it will be a long time______ we see each other again.
A:before; since
B:since; when
C:when; before
D:since; before;
B:since; when
C:when; before
D:since; before;
正确答案是:
同类题型
The children went home from the grammar school, their lessons _____ for the day.
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The wire was found broken And ______, there happened to be no one getting near
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