单项选择题

23（）

A．across
B．over
C．beyond
D．through

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单项选择题
21（）

A．comes
B．begins
C．appears
D．shines
单项选择题
Which of the following statements is NOT true
A．Even windmill' s action depends on the sun.
B．The sun produces enormous energy for man to make use of.
C．Some day man will be able to utilize 100 % of the solar energy that gets to the earth.
D．The sun produces different heating effects in different places.
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