问题

My friend, who _____on the International Olympic committee all his life, is retiring next month. [ ]

A: served
B: is serving
C: had served
D: has served

正确答案是：

同类题型

The river near our village is about _______ long.

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What is the ________ ________ your sweater—It is $50.

It was the second time that we ______ in holding such important parties

Could you tell me____——It’s twenty minutes by underground.