问题补充：
makes his parents proud is his son has been admitted by Beijing University.
A. That; because
B. That; what
C. What; that
D. What; because
答案：
A. That; because
B. That; what
(答案→)C. What; that
D. What; because
解析：主要测试主语从句和表语从句。从题干可知句中包含三套主谓结构，因此需要两个连词来引导句子，另外句子 makes his parents proud 既要充当主语从句，还缺少主语，所以用what来引导，由此先排除两个答案A和B，再结合句子 his son has been admitted by Beijing University.的结构及所需红党的成分可知只能用that引导表语从句，这一点和我们汉语是完全不相同的。译文：让他的父母自豪的是儿子被北京大学录取了。
