问题补充:
It isn quite that he will be present at the meeting.
A. sure
B. right
C. exact
D. certain
答案:
A. sure
B. right
C. exact
D. certain
解析:I am sure that +从句。He is sure to come. = He is certain to come.但在it作形式主语, that引导主语从句时, 主句中表语只能用certain, 不能用sure.