单项选择题

A．Travel a lot when young.
B．Be more responsible for his home.
C．Change the idea of getting married.
D．Made up his mind to be married.
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单项选择题
The second paragraph uses facts to develop the idea, a that ______.
A．the stronger the wind, the more the water vapor loss
B．carbon dioxide is the essential for plant development
C．a plant needs more water than is found in its composition
D．a plant efficiently uses most of the water it absorbs
单项选择题
According to the passage, which of the following statements is TRUE
A．The mineral elements will not be absorbed by the plant unless they are dissolved in its root.
B．The stems contain more water than the leaves.
C．Air around the leaf is found to be saturated.
D．Part of the carbon dioxide in the plants is synthesized.
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