设计说明：这项练习题的设计仍然和本节课的知识内容有关。通过此项练习，能够让学生更深的理解部分单词及词组，并能正确使用它们。对本节课的语言知识运用方面做个补充练习，拓展学生的知识。
Use the following words to finish the sentences: increase, along with, space, traffic, population, look up, thanks to, noise
l The _________ of the world is increasing.
l Planes make loud ____________ when they take off.
l Too many cars on the roads cause ______ problems.
l There is not enough ________ for everyone.
l ___________ the teacher’s help, he has finished his homework in time.
l You should _________ the new words in the dictionary.
l We know the _________ population is the biggest problem in the world.
l There is other pollution ________ smoke and noise.
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