随堂演练
及时体验　巩固提升
　　Ⅰ.单句语法填空(不多于3个单词)
　　1．The two persons are associated ________ the robbery last week.【版权所有：21教育】
　　答案　with　
　　2．The accident happened ________ dusk the day before yesterday just in front of our school.21教育名师原创作品
　　答案　at　
　　3．When you are travelling in the forest, you'll have to look out ________ snakes in grass.www-2-1--com
　　答案　for　
　　4．What has happened is just opposite ________ what we expected.【来源：21·世纪·教育·网】
　　答案　to　
　　5．Mr. Li is deep in trouble. Let's do something to help him ________.21**com
　　答案　out
　　6．In addition ________ these arrangements, extra ambulances will be on duty until midnight.　　21**com
　　答案与解析　to　in addition to"除......之外"，相当于besides，其后可接名词或动名词。www.21-cn-jy.com
　　7．She explained the instructions ________ the children could understand them.21·世纪*教育网
　　答案与解析　so that　so that引导目的状语从句，意为"以便于"，符合句意。
　　8．The patient's son asked the doctor the question ________ his father could survive the big operation.【来源：21cnj*y.co*m】
　　答案与解析　whether