英语四级考前每日一练(21)

　87．__________(听到他告诉我的消息)，I couldn’t help laughing．
　　88．Investigators agreed that passengers on the airliner __________(肯定就是在坠毁的那一刻遇难的)．
　　89．It is true to say that the more we learn about other people， __________(我们就越能更好地理解他们的观点)and as a rule．the better we like those people．

　　90．__________(多亏了你及时的帮忙)that we accomplished the task on time．
　　91．Sometimes children have trouble __________(从小说里找到事实)and may believe that such things actually exist．