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
单项选择题 He's working hard for fear that he（）
单项选择题 In architecture (建筑学), a vault (拱顶) is a proof or ceiling in the （） of an arch.
单项选择题 Since you need to catch an early train tomorrow morning, we（）now.
