45.After being tested in many ways， this newly-designed machine will ()in the near future.

50.My sister is used to ()with all the window’s open.

49.I need the job badly， as my money ()out by the ed of next month.

48.Children ()by their parents are allowed to enter the stadium.

47.In ()of speed， safety and price， the hi-railway system is perhaps the world’s
model 11 railway.

46.I’m sorry to ()your party; I weren’t in town.

45.You can eat food free in my restaurant ()you like.

44.Americans eat ()vegetables per person today as they did in 1910.

43.So instructive ()the student wanted to see it again.

42.A library with five thousand books ()to the nation as a gift.

41.Someone is ringing the doorbell.Go and see().