36.The dog _______ the rabbit but could not catch it.
A.ceased B.chained C.checked D.chased
37.If your letter is over weight, you must pay for the _______.
A.excess B.exceed C.checked D.chased
38.In the class the teacher asked the students to _______ their bad habits.
A.weaken B.omit C.overcome D.overtake
39.When you study in the United States, usually you have to buy your own health _______.
A.insurance B.expense C.evidence D.payment
40.Chocolate and ice-cream have different _______.
A.favour B.favourites C.fever D.flavours
36.D 37.A 38.C 39.A 40.D