问题
I told you that he would come to see you.— Actually I had little doubt _____ it was true. [ ]
A: that
B: whether
C: since
D: if
B: whether
C: since
D: if
正确答案是：
同类题型
My sons are not a little restless．— Oh Boys _______ be boys．
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When parents come to visit our school last week, Tom _______ them into the classroom.