1The dog _______ the rabbit but could not catch it. A.ceased B.chained C.checked D.chased 2If your letter is over weight, you must pay for the _______. A.excess B.exceed C.checked D.chased 3In the class the teacher asked the students to _______ their bad habits. A.weaken B.omit C.overcome D.overtake 4When you study in the United States, usually you have to buy your own health _______. A.insurance B.expense C.evidence D.payment 5Chocolate and ice-cream have different _______. A.favour B.favourites C.fever D.flavours 参考答案：DACAD