单项选择题

I suppose that he is serious, ______

A. do I
B. don't I
C. is he
D. isn't he
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单项选择题
Little ______ when I embarked on this quest(探求)where it would lead me.
A. have I know
B. had I know
C. do I known
D. did I know
单项选择题
Urban parents have difficulty ______ their children into childcare facilities.
A. in getting
B. get
C. to get
D. for getting
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