made the parents proud was their son had been admitted to a key university.
A. What; because
B. What; that
C. That; what
D. That; because
网友回答
A. What; because
(答案→)B. What; that
C. That; what
D. That; because
解析：句意：使父母骄傲的是他们的儿子被重点大学录取了。what引导的是主语从句，它在从句中作主语；was后的是表语从句，that在表语从句中不作成分只起连接的作用。