made the parents proud was their son had been admitted to a key university.A. What; becau

问题补充：

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

答案：

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。