21、It is ___________ he often fails in exams ____________ makes his parents worried about him.
A．what; that B．that; what C．that; that D．/; that
科目：高中英语 来源：2012-2013学年河北省邢台一中高二第三次月考英语试卷（带解析） 题型：单选题
It is ________ he often fails in exams ________ makes his parents worried about him.
| A．what；that. | B．that；what. | C．that；that. | D．because；that. |
科目：高中英语 来源：2014届河北省高二第三次月考英语试卷（解析版） 题型：单项填空
It is ________ he often fails in exams ________ makes his parents worried about him.
A．what；that. B．that；what. C．that；that. D．because；that.
科目：高中英语 来源： 题型：
It is ___________ he often fails in exams ____________ makes his parents worried about him.
A．what; that B．that; what C．that; that D．/; that
科目：高中英语 来源： 题型：014
It is ________ he often fails in exams ________ makes his parents worried about him.
[ ]
科目：高中英语 来源：江苏省如皋、海安两市2007～2008学年度高三期中调研联考试卷、英语 题型：014
It is ________ he often fails in exams ________ makes his parents worried about him．
A．what, that
B．that, what
C．that, that
D．/, that
科目：高中英语 来源：福建省安溪一中、惠安一中、养正中学2012届高三上学期期中联考英语试题 题型：016
It is ________ he often fails in exams ________ makes his parents worried about him．
what; that
that; that
that; what
/; that
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