课时作业14　Unit 4　Astronomy：the science of the stars

　　一、单元扣点训练

　　Ⅰ.短语填空

　　1．Don't worry—I'm sure things will get better ________.

　　2．We congratulated her on ________ a fine healthy baby.

　　3．Now that we have finished designing, the company, ________， should do the constructing work.

　　4．The wall ________ all the light. It should be pulled down.

　　5．She told her child to ________ when crossing the street.

　　6．Using the computer isn't difficult once you ________ it.

　　7．________ you are grown up, you should not rely on your parents.

　　8．Should another world war ________， what would become of human beings?

　　9．The crowd ________ when they saw the teams arrive.

　　10．I'll go with you ________ the station for company.

　　答案　1.in time　2.giving birth to　3.in its turn

　　4．blocks out　5.watch out　6.get the hang of

　　7．Now that　8.break out　9.cheered up　10.as far as

　　Ⅱ.完成句子

　　1．They were in time to produce carbon, nitrogen, water vapour and other gases, ______________________(这些后来就形成了地球的大气层). (atmosphere)

　　答案　which were to make the earth's atmosphere

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