问题

It was early morning in London _____ Prime Minister Cameron arrived to give his speech.

A:where
B:when
C:while
D:that

正确答案是：

同类题型

You’ve been watching _______ 8:00. It’stime to do your homework.

It is a good habit to______ your school things afterfinishing your homework.

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Shall I tell John about it？ —No, you _____ ,I’ve told him already.