Unit 9 Wheels 练习与解析
Ⅰ.语法训练
1.The price_______ ,but I doubt whether it will remain so.A.went down B.will go down C.has gone down D.was going down
1.C 说话时价格已经降了，动作已经完成，而且降价肯定对现在甚至以后造成了影响。
2.—Hi,Tracy,you look tired.
—I am tired.I________ the windows all day.A.cleaned B.had cleaned C.have been cleaning D.have cleaned
2.C 整整一天都在擦窗子，表示动作一直是持续的。 3.—Would you like to go to Shanghai?
—Yes.In the last ten years,great changes________ in Shanghai.A.has taken place B.have happened
C.have taken place D.have been taken place
3.C “in the last/past+时间”是现在完成时的标志性时间状语。take place不能用被动语态。
4.The little boy is dirty from head to foot because he________ in the mud all morning.
A.has played B.is playing C.has been playing D.was playing4.C 整个早晨都在玩，表示动作一直是持续的。
5.Proper first aid can save a seriously injured person,especially when he is bleeding heavily or _______.
A.has poisoned B.has been poisoned C.was poisoned D.is poisoning
5.B 已经中毒了。对以后的治疗或生命情形造成影响。 6.—Do you know the Summer Palace at all?—No,this is the first time I________ here.
A.came B.was C.have been D.am coming
6.C 表达“这是某人第几次做某事”的固定说法：It is/was the first/second ... time that sb.have/had done sth.。 7.—How is your grandfather?
—My grandfather________ for two years.
A.died B.has died C.had been died D.has been dead
7.B “for+时间”是现在完成时的标志性时间状语，且此句为主动语态。 8.—Sorry,I’m late.
—That’s OK.I____