Q:

Please let us________ if you have good suggestions, however, we ________ the difficulty working out the subject early.

A.know; recognized

B.recognize; know

C.recognize; recognized

D.know; recognize

对258人提供帮助

正确答案:A

考查两个动词know和recognize的用法.从整个句子来理解,第一空Please let us know意思是请告诉我们,从而可排除B和C两项,再从时态来分析,应选A.

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