6．Many students believe the choice of their courses and universities would be_based_on_their_own_interest (以他们自己的兴趣为基础)．

　　Ⅳ.串点成篇微表达

　　在这条河的附近过去有(There used to be ...)一些化工厂。他们把一些废水排放进了河里，造成了(contribute to/lead to)水质污染。在最近三年中所有的工厂都被关闭了(close down)，这条河里被污染的水也已经逐渐变成了(transform ... into ...)干净的水。

　　There_used_to_be_some_chemical_factories_near_the_river._They_poured_lots_of_waste_water_into_the_river,_which_contributed_to/led_to_water_pollution._In_the_last_three_years_all_the_factories_have_been_closed_down,_and_the_polluted_water_in_the_river_has_been_transformed_into_clean_water_gradually.

　　[本单元语言点温故练习]

　　Ⅰ.单句语语法填空

　　1．I like this house with a beautiful garden in front, but I don't have enough money to buy it.

　　2．It is the first time that I have_visited (visit) the Water Cube.

　　3．I asked him again in the hope that he would agree.

　　4．It's high time that you went/should_go (go) home and I'd rather you came (come) again sometimes in the future.

　　5．The headmaster is merciful to his employees.

　　6．What struck me was that they have all suffered a lot.

　　7．He decided to do some voluntary (volunteer) work for our school and community.

　　8．There are some health problems that, when not treated (treat) in time, can become bigger ones later on.

　　Ⅱ.完成句子

　　1．It's time that we_did/should_do_something_to_protect_our_environment .

　　是我们应该做些什么来保护环境的时候了。

　　2．His health demands that he (should)_go_to_bed early.

　　他的身体状况要求他应该早上床休息。

　　3．You had_better_not_follow his advice.

　　你最好不要听取他的建议。

　　4．I'd rather you hadn't_told_him the news that day.

　　我宁愿你那天没有告诉他那个消息。

　　5．It is suggested that they (should)_finish their work before 6：00 pm.

　　建议他们应该下午六点前完成工作。

　　6．If_I_were a bird, I would fly in the sky freely.

假如我是一只小鸟，我会在空中自由飞翔。