一、倍数增减的表示法

　　1) Force N1 _______________(比力N2大2.5倍).

　　2) This substance _______________(反应速度是另外那种物质的三倍).

　　3) The earth _______________(是月球大小的49倍).

　　4) The landlord _______________(想将租金提高三分之一).

　　5) They _______________(计划将投资增加一倍).

　　二、时态

　　1) Be quick, _______________(否则等我们到达教堂时婚礼就已经结束了).

　　2) When she got home, _______________(孩子们已经睡着了).

　　3) When I prepare for the college entrance examination, _______________(我姐姐将在海边度假).

　　4) I_______________(一上午都在修改我的简历).

　　5) Do you often go on holiday? _______________(不，我已经有五年没有度假了).

　　6) He joined the army in October, 2001. _______________(他参军已五年了).

　　三、被动语态

　　1) The blackboard and chalk _______________(正在被电脑和投影机所取代).

　　2) The book _______________(到今年年底就将已出版).

　　3) Computer models _______________(可以用来演示细胞工作的方式).

　　4) When the bill of fare was brought, _______________(我惊呆了，价格大大超出了我的预料).

　　5) _______________(必须立即采取有效措施)to eliminate sandy storms.

　　四、情态动词

　　1) The phone is ringing, _______________(但是没人接听。她一定不在家).

　　2) I can’t find my sunglasses. _______________(我可能昨天落在咖啡店里了).

　　3) You screamed in your sleep last night. _______________(你一定梦见什么可怕的东西了).

　　4) It’s a pity. _______________(你本应该邀请她来参加你的毕业典礼的).

　　5) _______________(其实我没必要穿上我最好的套装去参加那次聚会的); most of the guests were wearing jeans and sweaters.

　　五、虚拟语气

　　1) I wish _______________(我年轻的时候有你们这样的机会).

　　2) If only _______________(他知道这病是可以治好的)! Then he would not have killed himself.

　　3) —— Would you like him to paint your door with yellow stars?

　　—— I’d rather he _______________(漆成蓝色的，而且不带任何装饰).

　　4) It’s high time that _______________(采取措施解决交通堵塞的问题).

　　5) Hugh usually talks _______________(仿佛在大会上发表演说似的).

　　6) We insist that _______________(让杰克立刻进医院).

　　7) It was advised that _______________(在居民区设立更多的流动商店).

　　8) His proposal was that _______________(他们成立一个专门委员会来检查这个问题).

　　9) We are going to discuss his suggestion that _______________(取消期中考试).

　　10) It is ridiculous that _______________(我们在一个总是下雨的国家还缺水).

　　11) It is essential that _______________(每个人都为紧急情况做好准备).

　　12) _______________(如果他按照我告诉他的办法订票), we would have had quite a comfortable journey.

　　13) I was to have made a speech _______________(要不是有人把我的话打断了).

　　14) It didn’t rain last night. _______________(要是下了，地就会湿的).

　　15) _______________(如果我一直住在纽约), I would know the U.S. well now.

　　16) If the doctor had not come in time, _______________(他现在就不在人间了).

　　17) But for his help, _______________(我们就不会以这么低的价格租到房子了).

　　18) I used my calculator; _______________(否则，我会花更长的时间才能算出这道题).

　　19) Were I in your place, _______________(我会毫不犹豫地抓住机会).

　　20) Had it not been for their opposition, _______________(这项法案早就通过了).

　　21) Should there be another world war, _______________(人类的继续存在就会有危险).

　　22) He walked lightly _______________(以免惊醒婴儿).