专升本

19.He said _______ he would come back in a week.

A. when B. what C. that D. why

19.【答案】C。解析：考查宾语从句。when什么时候;what 什么;that那个，引导宾语从句只起引导作用，无意义;why为什么。句意：他说他会在一周后回来.结合语境可知本句宾语从句中不缺少句子成分，因此C为正确答案。

20.________ she couldn’t understand was ________ fewer and fewer students showed interest in her lessons.

A.What; why B. That; what C. What; because D. Why; hat

20.【答案】A。解析：考查主语从句和表语从句，分析句子结构“________ she couldn’t understand”是一个主语从句，从句中缺少understand的宾语，所以用what引导，what做从句的宾语，fewer and fewer students showed interest in her lessons是一个表语从句，根据句意：她不能理解的是为什么越来越少的学生对她的课表现出兴趣，所以用why来引导，故A为正确答案。

21.There is no doubt ________ Catherine is fond of dancing, for she always practices it on weekends.

A. whether B. if C. that D. which

21.【答案】C。解析：考查同位语从句，句意：毫无疑问Catherine喜欢跳舞，因为她总是在周末练舞。分析句子的结构可知，逗号之后为“for”引导的原因状语从句，逗号之前是主句，主句中结构为"There is no doubt that..."意为"毫无疑问……"，连词"that"引导同位语从句解释说明名词"doubt"的具体内容，同位语从句中句子结构和意思已完整，"that"无意义也不充当成分，只起连接词的作用.故C为正确答案。