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Look! There are many people on the beach. They are______ and happy.

      A. relaxed      B. relaxing         C. relaxes          D. relax

 

【答案】

B

【解析】根據(jù)look 可知時態(tài)為現(xiàn)在進(jìn)行時，故選B

 

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　　When the weather grows colder in autumn, there is less light and water for trees. The trees will have a rest to get ready for winter. They've made enough food in summer! The leaves no longer need water to make food. Without the water, the green chlorophyll starts to go away. The other colours in the leaf-the yellow xanthophylls and orange carotene come out. So the leaves don't really“turn”a certain colour. They just lose their green !

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(3) In autumn, the tree leaves turn yellow or orange because the green chlorophyll stops working and goes away.

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(4) Tree leaves no longer make food in summer.

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(5) We can infer（推斷）from the article that trees can clean the air.

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There are ______ people in Mary's family．

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(2)

Mr Green is a ______．

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