37.　 It is true _____________(说) a dog is man’s best friend or at least Robert’s best friends

完成句子

36.　 Though teaching is hard ,it is very _______________(值得做的)

35.　 Do you have any ______________________(经验) of working with kids

34.　 Failure is the mother of _________________(成功)

33.　 I’m very _______________(感激的) to you for you help

32.　 The doctor will give the sick boy an _____________(打针) at once

31.　 I have worked in the __________________(农村) for many years

30.　 congratulations! You have finished this work ______________(成功的)

29.　 It’s impossible that one doesn’t make any _____________(错误)all his life

28.　 The bag is made of _________(皮革)