问题

The book is primarily ___________ Soviet-American relations during the Cold War.

A:concerned about
B:concerned with
C:concerned for
D:concerned in

正确答案是：

同类题型

下列加点的成语使用正确的一项是

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Why do you suggest we buy a new machine?-Because the old one has been damaged _____.[ ]

John told me he’d like to go hiking with me, his voice joy.