Bothofthesemedicines
來源:國語幫 2.94W
問題詳情:
Both of these medicines _________beneficial to mankind since they were invented.
A. have been proved B. proved C. have proved D. are proved
【回答】
C
知識點:現在完成時及其被動式
題型:選擇題
問題詳情:
Both of these medicines _________beneficial to mankind since they were invented.
A. have been proved B. proved C. have proved D. are proved
【回答】
C
知識點:現在完成時及其被動式
題型:選擇題