九下英语关于现在完成时和一般过去时
J:Haveyouevertakenpartinanenvironmentalproject?
K:Yes,Ihave.IhelpwithaClean-UpDaylastyear.Itwasconsideredthebiggestclean-upprojectthiscityhadeverhave,
J:Howmanypeople___1__(take)part?
K:Ithinkmorethan1,000people__2___(come)tohelpout,
这两空分别用什么时态?要理由!