Theprofessorcanhardlyfindsufficientgrounds_____hisargumentinfavorofthetheory.A:onwhi

熱心網友

應該選A.base the argument on sufficient grounds . 即the argument 做base的賓語.而如選B的話,argument 就沒有了句子成分.

熱心網友

A

熱心網友

A:on which to base 如：The Day On Which You Are Coming To Me 《 情定大飯店》