1.Tian’anmen Square is the largest square in the world with an area of about 40 hectares.(with引导的短语作定语)

2.Impressive as the record is，it fades next to the story of Armstrong’s struggle against disease.(as引导让步状语从句时要倒装)

3.July 13，2001 saw a very bright night in Beijing that will never fade in history.(see在该句中的意思是“目睹;经历”)

4.A bird in the hand is worth two in the bush.(一鸟在手胜过双鸟在林。)

5.It was not until 1874，when a young American explorer followed the Nile from Lake Victoria through to Lake Albert，that this part of the river’s course was finally explored.(强调句型)

6.It was believed that the northern coast of this continent lay somewhere in the Pacific Ocean.(It is/was

believed that...人们相信……)

Units 3-4

Ⅰ.重要词汇及短语