问题

He, an average citizen, always thinks of_____ he can do more for the people
A:how
B:why
C:what
D:which
B:why
C:what
D:which
正确答案是:
同类题型
I like sleeping with the windows open _______ it rains.
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That hero who died in the war was so brave that he never ____ to the enemies until death.