(届山东省济宁市曲阜师大附中高三上学期期中考试英语试卷)Father said he would come to my graduation ceremony, he didn't, _______.
—Are you coming to Alice’s party? —I’m not sure.I _______ go to the concert instead.
—May I smoke here? —If you _______, choose a seat in the smoking section.
—Can we ski on this mountain? —Of course.However, at no time _______ you do so alone.
He _______ have completed his work;otherwise, he wouldn’t be enjoying himself by the seaside.
He must have been late for the conference yesterday, _______?