单项选择题

A．＄5.50.
B．＄ 50.00.
C．＄52.00.
D．＄ 4.50.
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单项选择题
A．Watch for changes in weather.B．Watch their altitude.C．Check for weak spots in their balloons.D．Test the strength of the ropes.
A．Watch for changes in weather.
B．Watch their altitude.
C．Check for weak spots in their balloons.
D．Test the strength of the ropes.
单项选择题
A．Shopping for shoes.B．Writing an article.C．Reading the magazine.D．Studying for a chemistry test.
A．Shopping for shoes.
B．Writing an article.
C．Reading the magazine.
D．Studying for a chemistry test.
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