②The number of the people invited to the meeting is (be) fifty, a huge number of whom are government officials.

　　③The final examination is coming up soon. It's time for us to get down to our studies.

　　④The real cause of the problem lies in the poor construction of the bridge.

　　⑤He worked late last night, or rather, early this morning.

　　⑥Learning foreign languages calls for your memory, time, patience and emotions. In conclusion, it is not a simple thing.

　　⑦The problem is that most students prefer to communicate with their Internet friends rather than their parents.

　　⑧I have decided to take the job offer, whether it is good or bad.

　　2．运用所学短语完成片段

　　Food really counts in our life. ①As_long_as (只要) we live, we need it. However, many people are complaining about the problems of food. There're ②a_huge_number_of (大量的) foods which contain poisonous chemicals in the market. So we can't ③tell_them_apart (把它们区分开). ④Or_rather (更确切地说), we are worried that they will do harm to our health. To our relief, our government are ⑤getting_down_to (开始着手) solving the problem.

　　Ⅱ.重难点多练

　　1．let相关短语万花筒

　　介、副词填空

　　①At the sight of a snake lying on the ground, she let out a scream.

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