[答案]　which→where

　　5．It's honor for me to attend your wedding.____________

　　[答案]　honor前加an

　　Ⅳ.单句写作

　　1．今年早些时候，我有幸见到了习主席。

　　Earlier this years, I ______________________ the President Xi.

　　 [答案]　had the honour of meeting

　　2．他们在雪地中走如此远的路是很困难的。

　　__________________ to walk such a long way in the snow.

　　[答案]　It was very difficult for them

　　3．我们把人口过剩看成是对社会的威胁。

　　We __________ overpopulation __________ to society.

　　[答案]　regard；as a danger

　　4．他们已经到了必须分手的地步。

　　They have reached ________________ they have to separate with each other.

　　[答案]　the point where

　　5．公司正在联合几家研究中心开发一种新产品。

　　The company is developing a new product ___________________.

　　[答案]　in combination with several research centers

V. 单元语法专练(单句语法填空)

1.The girl was unhappy because she was__laughed(laugh)at by some boys in the class.

2.All the preparations for the task have__been__finished (finish)，and we're ready to start.