The noise of the parade was very disturbing, which made it almost impossible for us to ______on what the speaker was saying.

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问题 The noise of the parade was very disturbing, which made it almost impossible for us to ______on what the speaker was saying.

选项 A、concentrate
B、be concerned
C、confirm
D、be dependent

答案A

解析 本题考查动词辨析。concentrate on,专心做……;concern, 关心,担心;confirm,证实.确定;dependent,独立于……,不依靠……。本题答案选A。
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