摘要： The flu is believed by viruses that like to reproduce in the cells inside the human nose and throat. A. causing B. being caused C. to be caused D. be have caused
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The flu is believed________ by viruses that like to reproduce in the cells inside the human nose and throat．
- A.causing
- B.being caused
- C.to be caused
- D.to have caused
The flu is believed _________ by viruses that like to reproduce in the cells inside the human nose and throat.
A. causing B. being caused C. to be caused D. be have caused
查看习题详情和答案>>The flu is believed______by viruses that like to reproduce in the cells inside the human nose and throat.
A.causing B.being caused
C.to be caused D.to have caused
查看习题详情和答案>>