被动语态
1.Nowthesemagazines______inthelibraryforalongtime.
A.havekept
B.arekeeping
C.havebeenkeeping
D.havebeenkept
2.Thechildrenareplantingtreesneartherive.
Trees_______________neartherivebythechildren.
3.SheoftenhearsPetersinginthenextroom.
Peter_____often_______________inthenextroom.
4.Weareplayingfootball.
Football_______________byus.