Question

该选What's the matter _____ they still haven't answered the telegram?A. when B. that C. though

D.however 说一下原因。many thanks！

Answer 1

答案选B，
本题的考点是同位语从句，引导同位语从句的词通有连词that，whether,连接代词what，who。连接副词how,when,where等
我们来看一下这个句子，What's the matter ，“发生什么事情了”
they still haven't answered the telegram ，“他们还没有回复电报”
根据意思可以判断，后面的部分是在对matter进行解释和说明，所以这应该是同位语从句，在根据matter是作宾语的成分，所以我们选择that

Answer 2

B 后面的句子做the matter 的定语