Makesure
來源:國語幫 3.1W
問題詳情:
Make sure ______ the experiment is over, all the electric facilities in the lab are turned off.
A. once if B. if once C. that once D. once whether
【回答】
C
知識點:連詞
題型:選擇題
問題詳情:
Make sure ______ the experiment is over, all the electric facilities in the lab are turned off.
A. once if B. if once C. that once D. once whether
【回答】
C
知識點:連詞
題型:選擇題