is no doubt John’s knowledge of first aid saved Ms Slade’s life.A. It; thatB. It; which

发布时间：2020-08-17 02:10:16

     is no doubt      John’s knowledge of first aid saved Ms Slade’s life.
A. It; that
B. It; which
C. There; that
D. What; that

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A. It; that
B. It; which
(答案→)C. There; that
D. What; that
解析：there is no doubt that是固定用法，意思是某事毫无疑问。
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