29、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
科目：高中英語 來源： 題型：單選題
科目：高中英語 來源： 題型：
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
科目：高中英語 來源： 題型：
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
科目：高中英語 來源： 題型：
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?
科目：高中英語 來源：2012-2013學年天津河西高三年級總復習質量調查英語卷（解析版） 題型：單項填空
The flu is believed ______ by viruses that like to reproduce in the cells inside the human nose and throat.
A. to be caused B. to have caused C. being caused D. causing
科目：高中英語 來源：2012-2013學年天津河西模擬二英語卷（解析版） 題型：單項填空
The flu is believed ______ by viruses that like to reproduce in the cells inside the human nose and throat.
A. to be caused B. to have caused C. being caused D. causing
科目：高中英語 來源：20102011學年河南省衛(wèi)輝市高二4月月考英語卷 題型：單項填空
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
科目：高中英語 來源：20102011學年度河北省高二第二次階段考試英語試題 題型：單項填空
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 have caused D. to be caused
科目：高中英語 來源： 題型：
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?
科目：高中英語 來源：0113 期中題 題型：單選題
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