单项选择题
A.to write B.to writing C.in writing D.on writing
Jack enjoys（）Peking Opera.A.listen toB.listeningC.liste...
单项选择题Jack enjoys（）Peking Opera.
A.listen to B.listening C.listen D.listening to
It's not safe（）in the street.A.playedB.playC.playingD.p...
单项选择题It's not safe（）in the street.
A.played B.play C.playing D.plays
It's very convenient（）hereA.to liveB.liveC.livedD.livin...
单项选择题It's very convenient（）here
A.to live B.live C.lived D.living
