51.It is believed that………人们认为…….

　　?It is believed that what she said is true.

　　大家相信她的话是真的.

　　52.It is easy enough to…………相当容易.

　　?It is easy enough to copy and paste; but you should write something by yourself.

　　?抄袭（复制十粘贴）非常容易,但是你应该自己写一些东西.

　　53.It is high time …… 现在是……的时候了./早就应该……了. [从句使用虚拟语气]

　　?It is high time we stopped talking about this silly question.

　　?我们早就该结束讨论这个愚蠢的问题了.

　　54.It is no use doing sth. 做某事是毫无用处的.

　　?It is no use talking without doing.

　　?光说不做是没有用的.

　　55.It is （very） difficult to…………（非常）困难.

　　?It is very difficult to foretell what the world will be like in the future.

　　?很难预测将来的世界会怎样. [ foretell v. 预言;预测]

　　56.It sounds like ………听起来好像…….

　　?It sounds like a good idea. 听起来这主意不错.

　　57.It takes / took / will take sb. some time / money to do sth. 某人花/花了/将花多长时间/多少钱做某事.

　　?It took me years of hard work to speak good English.

　　为了讲一口流利的英语,我花了多年时间刻苦操练.

　　58.It wasn't until…that…… 直到……才…….

　　?It wasn't until yesterday that I got your letter.

　　我直到昨天才收到你的来信.

　　59.It's a great pleasure to…………（感到）非常愉快.

　　?It's a great pleasure to do business with you.

　　跟你做生意我感到非常愉快.

　　60.Make sure to do sth.-定要做某事.

　　?Make sure to leave a note if you go out.

　　你出去的话一定要留个条.