66. ____ ____ ______ ______(人们相信) greenhouse gases are the main causes of global warming.

67. The house which_______ _______ ______ ____________ (状况欠佳) will be repaired soon.

68. 他的成功应该归功于他的努力学习。

He _______ ________ _________ ________ his hard study.

69. You are likely to make great progress in your study. (用it作形式主语改写句子)

  _____________________________________________________________________.

70. He did not return to his hometown until 2008. (强调划线部分)

  _____________________________________________________________________.

71. We can’t accept the truth. She is the mother of six children. (用同位语从句合并句子)

______________________________________________________________________.

1．She asked me whether I had seen him the night before．（改成直接引语）

She asked, “___1_____ ____2____ see him ____3_____ ___4_____?”

2．My mother said to me: “Come back before 10．” （改成间接引语）

My mother ___5____ me ___6________7______ ___8______ before 10．

3．It was a very difficult period of my life．At that time I first met Nelson Mandela． （连成一定语从句）

_____9____ ____10______ ___11_______ I first met Nelson Mandela was a very difficult period of my life．

4．All hope was not lost．（写出同义句）

___12____ ____13____ ___14_____ was lost．

5．He prefers riding a bicycle to riding on a crowded bus．（（写出同义句）

____15____ __16_____ _____17____ on a crowded bus, he prefers to ride a bicycle．

6．We seemed to be able to see for miles at one point．（用it作形式主语改写）

___18_____ ___19_______ ___20_______ we were able to see for miles at one point．

按要求翻译句子

1. 他学习如此努力以至被一所重点(key)大学录取。（so ...that )

2. 正如大家所知道的，学好英语对我们是很重要的。

 （用as 引导的非限定性定语从句；it作形式主语）

3.  要过大约半个月我们才过（have）寒假。（It ....before )

4.  我们昨天看过的这部电影今年在电视上已放映了很多次了。（用定语从句——划线部分、

   被动态）

5.  12月31日我们正是在学校开party 的。（用强调句）