Dr. Ma has ___ most of his time to _...

Dr. Ma has _____ most of his time to _____ people with eye problems.

A. devote， helping B. devoted， help

C. devoted， helping D. devote， help

C 【解析】试题分析：句意：Dr. Ma把他的大部分的时间都致力于帮助眼睛有问题的人们。短语devote...to doing sth.表示把……致力于……；根据题意，故选C。考点：考查动词短语辨析。

考点分析：

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Dr. Ma has _____ most of his time to ___...