國文屋

位置:首頁 > 練習題 > 

 Accordingtothereport,thenumberofanimalsusedinexperimen...

練習題2.54W

問題詳情:

 Accordingtothereport,thenumberofanimalsusedinexperimen...

 According to the report, the number of animals used in experiments _______by 30% over the years.

A. was reduced               B. has been reduced      C. were reduced             D. have been reduced

【回答】

B

知識點:現在完成時及其被動式

題型:選擇題

標籤: