2．=　　　　 　。

1．在实数 ，，　 　， ， 　中是　　　　　 无理数 。

18.are jumping,running 19.read,listen 20.driving 21.Does,study 22.carry 23.borrow 24.has 25.go 26.likes 27.playing,is playing 28.to be,wants 29.goes 30.is snowing 31.tell 32.are,doing 33.Is,opening;is closing 34.buys 35.is putting 36.see 37.wears 38.do,like 39.Go,turn 40.eating 41.are watching 42.Is,sleeping 43.are waiting 44.are having 45.not play 46.pass 47.getting 48.is reading 49.not go 50.is talking

6.does,teach ;teaches 7.doesn’t work 8.Are 9.isn’t watching

es 12.likes 13.does,do;watches 14.are,cleaning;are cleaning 15.going 16.are singing 17.speak

1.is swimming 2.is,lives 3.don’t like 4.are having 5.Do,make

49.　I think you’d better ___________(not go) out alone at night 50.　--Where　is　Zhang　Yan?　 　　　--She　_______(talk)with　her　teacher　in　the　teacher’s　office.　

Keys:

48. 　 Listen,　someone　_______(read)in　the　classroom.

47. My parents are busy ______________(get ) ready for the visitors.

46．You’d better________________(pass) this book to her.

45．Would you please___________(not play) with the chalk?