indow.Itmadeusnotsleepwellatnightandfeelsduringtheday.4.MyclassmatesandIhavefounda(粉红色的)walletontheplayground.Wediscussaboutwwalletitis.5.I’mreallyworried,becauseIlostanancientcoin.Itisvery(有价值的).6.I’mondutytoday.SoIwenttoschoolearlierthanbeforetocleantheclassroom.Buttomysurprise,theclassroomwasveryclean.(某人)hascleanedit.Iwonderedwhodidit.7.Therehavebeenstrangecrop(圆圈I)ontheearthformanyyears.It’ssoamazing!Allourclassmateswonderhowtheyappear.(二)Inferences:根据语境用might,could,can,must,can’t填空。1.Ican’tfindmyconcertticketandIwasanxious.ottobringithome.ButInevertookthetickettoschool,soitbeatschool.2.Thismorningsomeonehelpedmecleantheclassroom,butIdon'tknowwhodidit.IthinkitbeLinTao.Heiswarm-heartedandalwayshelpstheclassmates.ButIdidn’tseehimthismorning.oldmethathewasillathometoday.Soitbehim.Then,it