练习题
1.Though you stay in the sea for weeks, you will not____________（ 失去联系 ） the outside world.
2.The fifth generation computers, with artificial intelligence,_____________（ 正在研制 ） and perfected now.
3.How close parents are to their children_________________ __（ 有很强的影响 ） the character of the children.
4.The room is in a terrible mess; it _____________________ （肯定没打扫过） .
5.With tears on her face, the lady _____________________ （看着他受伤的儿子被送进手术室）
答案及解析：
1.lose contact with
「超级短语」lose contact with/lose touch with与……失去联系
2.are being developed
「超级句型」"be being done"现在进行时的被动语态表示此时此刻某事正在被做。其中动词be应随主语作相应变化。
3.has a strong influence on/effect on
「超级短语」influence/effect作名词（常与on连用）对…有影响力。
influence指"通过说服、举例等对行动、思想、性格等产生不易觉察到的,潜移默化的影响",如:Influenced by a high-school biology teacher, he took up the study of medicine.
effect指"实现"、"达成",着重"造成"一种特殊的效果,如:This book effected a change in my opinion.
4.can't have been cleaned
「超级句型」"情态动词+have done"表示推测，must/can/may/might/could各用于不同句型中，must只用于肯定句中，can/could不能用于肯定句中，may/might不能用于疑问句中。can't表示不可能，may not表示可能不。如题中推测的为过去的事情，情态动词后则用完成形式。
5.watched her injured son sent into the operation room.
「超级句型」see/watch…sb./sth.+done强调某动作的全过程，且宾语和动作间是被动关系。
