56.The dog _____ the rabbit but could not catch it.
　　A.ceased B.chained C.checked D.chased
　　答案：D.chased狗追兔子，但不能抓住它
　　57.If your letter is over weight, you must pay for the _____.
　　A.excess B.exceed C.checked D.chased
　　答案：B excess如果你的信超重，你必须支付超出的部分。
　　58.In the class the teacher asked the students to _____ their bad habits.
　　A.weaken B.omit C.overcome D.overtake
　　答案：overcome在课堂上老师要求学生克服不良生活习惯。
　　59.When you study in the United States, usually you have to buy your own health _____.
　　A.insurance B.expense C.evidence D.payment
　　答案：insurance当你在美国学习，通常你要自己买医疗保险。
　　60.Chocolate and ice-cream have different _____.
　　A.favor B.favorites C.fever D.flavors
　　答案：flavors巧克力和冰淇淋的味道不同。
　　61.Certainly I posted your letter — I remember _____ it.
　　A.posting B.to post C.to be posting D.have posted
　　答案：A.posting我当然给你寄过信了-我记得寄过它.
　　62.They must be at home — there's a light _____ in the bedroom.
　　A.to shine B.to be shining C.shining D.having shined
　　答案：C.shining 他们一定在家里 - 卧室里有盏灯开着。
　　63.Mr. Smith dislikes _____ such clothes but his wife likes _____ them.
　　A. to wear, to wear B.to wear, wearing C.wearing, to wear D.wearing, wear
　　答案：C. wearing, to wear 史密斯先生不喜欢穿这样的衣服，但他的妻子喜欢穿。
　　64.When you're learning to drive, _____ a good teacher makes a big difference.
　　A.have B.having C.and have D.and having
　　答案：B.having 初学驾驶如有好的教师指导，差别很大。
　　65._____ this report _____ in such a short time was quite a difficult exercise.
　　A.Getting, done B.Get, done C.To get, to do D.Getting, to do
　　答案：A. Getting, done 在这么短的时间完成这份报告是相当困难的 注意句子的谓语是was，getting this report done in such a short time是动名词短语，用做句子主语。又因this report与do为被动关系，故用done。