It is almost five years ____ we saw each other last time.
A. before
B. since
C. after
D. when
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Simon thought his computer was broken ____ his little brother pointed out that he had forgotten to turn it on.
A. until
B. unless
C. after
D. because
It wasn’t until nearly a month later ____ I received the manager’s reply.
A. since
B. when
C. as
D. that
You must keep on working in the evening ______ you are sure you can finish the task in time.
A. as
B. if
C. when
D. unless
That was really a splendid evening. It' s years _______ I enjoyed myself so much.
A. when
B. that
C. before
D. since