问题
With the word“PM25"_____appearing in media reports，people pay greaterattention to it and seek health tips for smoggy days
A:which to be based on
B:on which to base
C:which to base on
D:which to base
B:on which to base
C:which to base on
D:which to base
正确答案是：
同类题型
Her wish is__________she could lose weight soon.
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