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With so much noise outside, the students can’t _____ their homework.
A.concentrate onB.depend on C.keep onD.put their hands on
A

试题分析:重点理解句意,掌握四个选项的区别concentrate on集中精力于某事 depend on依靠 keep on 继续put their hands on找到;把手放到什么上面  整个句意为:伴随着外面巨大的噪音,学生们不能集中精力于他们的功课上。故选A。
点评:本题不难,理解了句意后不难得出答案。平时的复习,要多对动词的短语进行积累、记忆,同时最好能在作文运用出来,这样就能做到学以致用了。
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