第7题: [单项选择]______ the flight is canceled, the seminar will have to be postponed. A. (A) While B. (B) if C. (C) Although D. (D) Besides 参考答案:B 答案解析:If can indicate a possible situation. Choice (A) indicates simultaneous action. Choice (C) indicates
第32题: [单项选择]They had a pleasant chat _____a cup of coffee. A. for B. during C. with D. over 参考答案:D 答案解析:over意思为“边…边…”,符合题意,表示喝咖啡的同时在聊天;for表示目的,与题意不符;during表示在一段时间内做的事情,后面跟表示时间的名词;with表示对象,后面要跟人,故选D。