问题

is estimated that over 15,000citizens will ____ the celebration, such a grand occasion once every ten years

A:on
B:at
C:for
D:In

正确答案是：

同类题型

The charity sale our school organizes every year has taught us much that we would never have________ learned in class

this house with a beautiful garden in front, but I don’t have enough moneyto buy__________

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你与对方初次见面并听到对方说Niceto meet you 时，你应该说____________

Could it be in the room we had a talk last night you left your keys ?