In autumn, the in the trees turn yellow.——青夏教育精英家教网—

摘要： In autumn, the in the trees turn yellow.

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1.----How many _____(sheep)are there on the hill ?
   ----- Twenty-one .1
2.The _____(leaf)on the trees turn yellow when autumn comes.
3.We should do morning exercises every day to keep _____ (health) .
4.-----  Can I help you ?
   ------- I'd like two _____ (kilo)of pork .
5.My friends and I go swimming _____ (two)a week in summer .
6._____ (卷心菜)are my favourite .
7.Millie likes to have a bowl of _____ (汤)before meals.
8.It's not a good habit to go to school _____ (没有)breakfast.
9.Best _____(祝愿)to your parents .
10.Jane and Linda want to be _____(舞蹈)when they grow up .

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用所给词的适当形式填空。

1. Oh, I think you have put too much salt in the soup. It tastes quite      (salt).
2.     (leaf) on the trees turn yellow in autumn.
3. What's this called in English? It's a           (fly) disk.
4. The customer thought the         (potato) weren't thin enough.
5. We know the boys       (take) good care of by the nurse.

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用所给词的适当形式填空

1. —How many ______(sheep) are there on the hill?
    —Twenty-one.
2. The ______(leaf) on the trees turn yellow when autumn comes.
3. We should do morning exercises every day to keep ______ (health).
4. —Can I help you ?
    —I'd like two ______ (kilo) of pork .
5. My friends and I go swimming ______ (two) a week in summer.
6. ______ (卷心菜) are my favourite.
7. Millie likes to have a bowl of ______ (汤) before meals.
8. It's not a good habit to go to school ______ (没有) breakfast.
9. Best ______ (祝愿) to your parents .
10. Jane and Linda want to be ______ (舞蹈) when they grow up.

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用所给单词的适当形式填空。

1. The teachers in our school are _________ ( friend) to us.
2. Please _________ ( be) quiet. The teacher is coming.
3. _________ (leaf) on some trees usually turn yellow in autumn.
4. There are three _________ ( box) of milk on the table.
5. The music sounds _________ ( relax) .

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阅读理解

　　Yellow，orange，red and green梩ree leaves make autumn a colourful time!Who paints all these colours?It is the leaves themselves.Inside a leaf，there are millions of little colour

'bags'.They ale green，yellow and orange.The green ones are called chlorophyll (叶绿素).The yellow ones are called xanthophylls(叶黄素).The orange ones are carotene(胡萝卜素).

　　In the summer，the green chlorophyll is very，very busy.It makes food for the tree.It catches sunlight to change water and carbon dioxide(二氧化碳) into sugar.This sugar is the food for the tree.It is so busy that it covers up all of the other colours in the leaf.

　　When the weather grows colder in autumn,there is less light and water for trees.The trees will have a rest and 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梩he yellow xanthophylls and the orange carotene come out.So，the leaves don't really turn a certain colour梩hey just lose their green!

　　But how about the red，purple and green leaves?The leaves look red or purple because they have some sugar in them.They steal some food from the tree!The green leaves are from the evergreen trees(常青树).The evergreen trees stay green all year long.Their leaves don't lose water in winter.

(1)

The tree leaves have the following colour 'bags' except(除了)________.

　　A.red　　B.yellow　　C.orange D.green

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(2)

In the summer，the green chlorophyll ________.

　　A.leaves the tree leaves　　B.works hard for the tree leaves

　　C.steals food from the tree D.has lots of sugar in it

[　　]

(3)

In the autumn，the tree leaves turn yellow or orange because ________.

　　A.they have enough air in them