精选优质文档-倾情为你奉上I.选择填空。从各题的四个选项中选择一个最佳答案并将其代表字母填入题前括号内。(共20小题，每小题1分)( )1.What _ you _ this time yesterday?A.did；to B.are；doingC.was；doingD.were；doing( )2.I think there _ robots at school in 50 years.A.be B.will be C.haveD.will have( )3.People will _ 200 years old.A.live B.live to beC.live to D.are( )4.Mary wants to _ 30 yuan for this pen.A.spendB.pay C.takeD.cost( )5.The lit
