问题补充:
There is no doubt smoking can seriously damage our health.
A. that
B. whether
C. why
D. which
答案:
(答案→)A. that
B. whether
C. why
D. which
解析:考查There is no doubt that…结构。Doubt作名词时,用在否定句中,后面跟that引导的同位语从句。所以选A。
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