6、.9.Howmanysheep____you____(get)?Onlyone.10.I’velostmypen.____you____(see)itanywhere?强化练习一、单项选择。1、Both his parents look sad.Maybe they _________what's happened to him. A. knew B. haveknown C. mustknow D.willknow2、He has ______
7、_been to Shanghai,has he? A. already B.never C.ever D.still 3、Have you met Mr Li______? A. just B. ago C.before D. amomentago4、Thefamouswriter_____onenewbookinthepasttwoyear. A.is wr