问题
g kites, ______ some researchers point out, can not only bring about joy to us, but also promote our physical and mental health.
A:which
B:what
C:as
D:where ;
B:what
C:as
D:where ;
正确答案是：
同类题型
Both Class 3 and our class won’t be able tofinish the work unless they ___ each other
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