---Doestheriverstillfloodthevillageduringthesummer?  -...

問題詳情：

 ---Does the river still flood the village during the summer?

   ---Thanks to the past two years’ river engineering efforts, the impact____.

    A. was reduced                B. has been reduced        C. has reduced         D. is reducing

【回答】

B

知識點：現在完成時及其被動式

題型：選擇題