60.It is said that more 30 percent senior boy students are smoking now.

59.Everything went as expecting，though not very well.

58.Enterprises in charge of the state must find new ways out.

57.Burning garbage can provided energy to us，which is a good way to protect the environment.

56.“Why not to take a vacation at the seaside? ”，said my boss to me.

55.While having class，don’t keep your eyes to the floor.

54.That he kept silence might suggest he should not agree with my opinion.

52.But sir，I have a more question to ask you.Will you explain it to me?

you imagine yourself to live on a lonely island for years like Robinson Crusoe?