Scientistsareconvinced
來源:國語幫 1.7W
問題詳情:
Scientists are convinced ______ the positive effect of laughter ______ physical and mental health.
A. of;on B. by;in C. of;at D. on;at
【回答】
A
知識點:介詞
題型:選擇題
問題詳情:
Scientists are convinced ______ the positive effect of laughter ______ physical and mental health.
A. of;on B. by;in C. of;at D. on;at
【回答】
A
知識點:介詞
題型:選擇題