题目内容

Jasmine was holidaying with her family in a wildlife park _____ she was bitten on the leg by al lion.

A. when
B. while
C. since
D. once

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It is almost five years ____ we saw each other last time.

A. before
B. since
C. after
D. when

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

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