单项选择题

To judge a child's standard, his marks in a test must be compared with marks gained by ______.

A．others of the same age
B．older children
C．younger children
D．adults
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单项选择题
The kangaroo rat is different from other animals in that ______.
A．it can produce water through breathing
B．it can store water in parts of its body
C．it can maintain different body temperatures
D．it can drink a 10t of water at a time
单项选择题
Compared with other desert animals, the camel can bear ______.
A．a very low body temperature
B．only a little change in body temperature
C．a big increase in body temperature
D．a constant change in body temperature
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