190. 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]

189. It is (not) true that... ……(不)是真的。

It is true that city life is much more exciting than country life.

确实，城市生活比乡村生活更令人兴奋。

188. It is thought that... 人们认为……。

It is thought that man's ability to learn languages makes him different from the animals.

人们认为人类的语言学习能力使其区别于动物。

187. It is said that... 据说……。

It is said that Liu Xiang will come to our city soon. 据说刘翔不久将来我市。

186. lt is required that... 要求……。　 [主语从句使用虚拟语气l

It is required that every student (should) attend the meet­ing this afternoon.

要求每个学生都参加下午的大会。

185. It is reported that...据说……。／据报导……。

It is reported that the world famous football star will come to China next year.

据说那位闻名世界的足球明星明年要来中国。

184. It is (rather) common to do... ……(相当)普遍。

It is rather common for women to hold important positions in companies now.

如今女性在公司担任重要职位相当普遍。

182. It is possible /impossible to...……是(不)可能的。

It's impossible to predict the outcome of the game.

要预知比赛结果是不可能的。　 [ outcome n. 结果；成果]

1 83. It is dangerous to...．．．危险。

It is dangerous to explore the jungle with so many wild animals around.

在很多野兽出没的丛林里探险是危险的。

181. It is not unusual for sb. to do... 某人做……不足为奇。

It is not unusual for the British people to drink tea.　 英国人喝茶不足为奇。

180. 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。