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题型：单选题题类：模拟题难易度：普通

Peter was so excited _______ he received the invitation to the important meeting.

A、that B、though C、when D、before

举一反三

—Mum， shall we have lunch? —We will have it when your dad .

It was snowing hard_______we had to stay at home and watch TV.

You can either take a bus ______ go there on foot.

根据句意选用适当的引导词填空

whether if when which who why

The scientist has failed in the test many times, ______he never gives up.

I'll tell him the news as soon as he ______ back.

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