Question

With so much noise outside, the students can’t _____ their homework.

1. A.
   concentrate on
2. B.
   depend on
3. C.
   keep on
4. D.
   put their hands on

Answer 1

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。
考点：考查动词短语的意思。
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。