Scientistssayitmaybefiveorsixyears
來源:國語幫 3.34W
問題詳情:
Scientists say it may be five or six years ____ it is possible to test this medicine on human patients.
A. since B. after C. before D. when
【回答】
C
知識點:連詞
題型:選擇題
問題詳情:
Scientists say it may be five or six years ____ it is possible to test this medicine on human patients.
A. since B. after C. before D. when
【回答】
C
知識點:連詞
題型:選擇題