单项选择题

The news is mainly about ______.

A. the moon is a big sand trap
B. water may be plentiful in the interior of the moon
C. collision made the moon so hot
D. scientists can identify elements present in the moon
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单项选择题
According to Samantha Heller, people tend to eat milk chocolate because
A. it is less bitter than dark chocolate.
B. it is more healthy than dark chocolate.
C. it has special flavor with many nutrients.
D. it is less expensive than dark chocolate.
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