把凸透镜当放大镜用时,必须把观察物放在 ,用凸透镜观察窗外的物体所成的像是 (选填“正立”或“倒立”)。
The earth goes_____the sun.( )
A.aroundB.throughC.betweenD.across
﹣Hello, Sally! Can I see Mr. Brown?
﹣____.I'll tell him you are here.( )
A.What a pityB.Just a minute
C.CongratulationsD.Never mind
My two cousins decide____a business together.( )
A.to startB.startingC.startD.started
﹣Is dinner ready? ﹣Not_____.( )
A.alreadyB.justC.yetD.ever
She______an English magazine when I came in.( )
A.readsB.has read
C.will readD.was reading