【11.Whynot_____himdothejobbyhimself?A.toletB.lettingC.arelettingD.let12.When_____objectscloserthanonemeter,recordusingLCDscreen.A.recordB.torecordC.recordingD.recorded13.Besuretoturn_____allthelightsbeforegoingtobe】

　　11.Whynot_____himdothejobbyhimself?A.toletB.lettingC.arelettingD.let

　　12.When_____objectscloserthanonemeter,recordusingLCDscreen.

　　A.recordB.torecordC.recordingD.recorded

　　13.Besuretoturn_____allthelightsbeforegoingtobed.

　　A.onB.toC.offD.up

　　14.As______before,Icouldn’tallowyoutodothat.

　　A.mentionedB.refertoC.speakofD.mention

　　15.Whatdoesallyouhavedone_____

　　A.meaningB.meanC.meantD.meantfor

　　16.Halfoftheapple_____gotrotten.

　　A.isB.areC.haveD.has

　　17.Allthedata______checkedagainandagain.

　　A.isB.hasbeenC.havebeenD.have

　　18.We_______thesemeasureswillraisethequalitiesofourhighereducation.

　　A.hopeB.askC.wishD.thinkof

　　19.______hiscarelessdriving,theaccidenthappenedlastnight.

　　A.BecauseB.BecauseofC.SinceD.For

　　20.Never_____suchabeautifulsunset.

　　A.IsawB.amistakebeC.haveIseenD.bemistake