题目内容
Lawrence Craven,a doctor from the USA,is the author of several published reports,one of ________introduced the idea in 1953 aspirin could reduce the risk of heart attacks.
|
A.them; when |
B.which; that |
C.what;that |
D.which; when |
【答案】
B
【解析】本题同时考查非限制性定语从句和名词性从句中的同位语从句,故第一空用which,第二空用that。
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