问题
It is playing computer games _______ the boy spends most of his spare time.
A:that
B:which
C:when
D:how
B:which
C:when
D:how
正确答案是：
同类题型
The expo is being held in Shanghai, _______a lot of advanced technology is shown for the first time.
Peter, a superstar in environment protection, reduces plastic and other _______ through DIY.
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