单项选择题

The word "drowsy" in the last paragraph means ______.

A．sick
B．asleep
C．a little sleepy
D．nosy
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单项选择题
According to the author, when some change in a product is necessary, a manufacturer will choose to ______.
A．lower the production cost
B．hire a better designer
C．improve its quality
D．alter its image
单项选择题
For whom is the author probably writing this passage
A．Train engineers.
B．General audiences.
C．Professors of statistics.
D．Young children.
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