1、第二十一天单句语法填空1、—WhenshallIcall,inthemorningorafternoon?— .I’llbeinallday.2、Myuncle’shouseinthedowntownareaismuchsmallerthanours,butitistwice__________expensive.3、We __________(occasion)meetforadrinkafterwork.4、Oneshouldlearntodealwithone'sproblems__________ on