問題詳情:
The flu is believed by some scientists ________by viruses that like to reproduce in the cells inside the human nose and throat.
A.causing B.being caused C.to have caused D.to be caused
【回答】
B
知識點:非謂語動詞
題型:選擇題
問題詳情:
The flu is believed by some scientists ________by viruses that like to reproduce in the cells inside the human nose and throat.
A.causing B.being caused C.to have caused D.to be caused
【回答】
B
知識點:非謂語動詞
題型:選擇題