题目内容

【B7】

A. and
B. but
C. or
D. except

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【B18】

A. contains
B. containing
C. contained
D. having contained

【B15】

A. comfort
B. comforts
C. comfortable
D. comfortably

【B3】

A. relation
B. relations
C. relationship
D. relationships

It is believed by many that the cancers of the lungs and throat are caused ______ by smoking.

A. mainly
B. partly
C. in some way
D. in no way