问题

Have you ever dreamed of staging a concert, thousands of people are applauding and appreciating your music?

A:at which
B:when
C:for which
D:which

正确答案是：

同类题型

There is a new problem involved in the popularity of private cars ____________ road conditions need ____________.

One learns alanguage by making mistakes and ______ them

of the Pacific OceanCanada.

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