26．Even if there is no scientific proof yet secondhand smoke causes cancer, there is no r

发布时间：2020-08-15 02:58:06


26．Even if there is no scientific proof yet      secondhand smoke causes cancer, there is no reason why nonsmokers should be forced to take this risk．
A. which
B. that
C. when
D. Where

网友回答

A. which
(答案→)B. that
C. when
D. Where
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