问题
Responsibility for family is ________happiness exists when you think of your parents and children.
A:which
B:what
C:where
D:whether
B:what
C:where
D:whether
正确答案是：
同类题型
The class __________ 80 students ishard to manage.
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The old couple, ____had been admitted to university, were living a hard life．
He’s not got another job yet and it’s not______ he will for some time.
________the advice of doctors, he left the hospital early and soon he got even worse.