单项选择题
A. never see B. did never see C. had never seen D. shall never see
—We didn't see him at the lecture yesterday.—He（）it.A. ...
单项选择题—We didn't see him at the lecture yesterday.—He（）it.
A. would have not attended B. can not have attended C. needn't have attended D. mustn't attend
He's working hard for fear that he（）A. should fall behi...
单项选择题He's working hard for fear that he（）
A. should fall behind B. fell behind C. may fall behind D. would fall behind
In architecture (建筑学), a vault (拱顶) is a proof or ceili...
单项选择题In architecture (建筑学), a vault (拱顶) is a proof or ceiling in the （） of an arch.
A. form B. figure C. shape D. appearance
