问题

Research shows that though students benefit from having parents involved at school, _____ happens at home matters much more.

A:which
B:what
C:that
D:whether

正确答案是：

同类题型

I don’t think teenagers should drivecars.— . They aren’tserious enough.A．I don’t agree

Students should involve themselves in community activities ___________ they can gain experience for growth.

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Samaranch, whois old friend of Chinese people, diedon April 21, 2010.

It is difficult to ____ one twin from theother. They almost don’t ____ from each other.