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What does blood do for us? It brings food to all parts of our bodies and takes waste away from them. All parts of our bodies are made of cells. These cells are very small. They all need all the time. No one could make pictures of cells because no one could see them.
What makes the blood move round the body? The heart is a pump. It pumps the blood and sends it round the body. The heart has rooms with doors between them. It pumps blood in and out through these doors by changing the size of the rooms so that the doors are opened and shut. The heart keeps a stream of blood going all around the body and back again to itself. The heart is a very important part of one's body. When it stops beating, one will die.
小題1:Blood is important to our body because it can

A．provide pictures of cells	B．bring food and waste
C．from a stream	D．move around the heart

小題2:What does the underline word "microscope" mean in Chinese?

A．顯微鏡

B．探測儀

C．放大鏡

D．攝像機

小題3:According to the passage, a pump is used to

A．open or shut doors	B．send something up
C．change the size of rooms	D．make something in or out

小題1:B
小題2:A
小題3:D

小題1:細節(jié)理解題，根據(jù)文中語句“It brings food to all parts of our bodies and takes waste away from them.”理解可知。
小題2:詞義理解推斷題。
小題3:細節(jié)理解題，根據(jù)文中語句“It pumps blood in and out through these doors by changing the size of the rooms so that the doors are opened and shut.”理解可知。

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