单项选择题

It is hot and dry, and the flowers need______.

A．being watered
B．be watered
C．to water
D．to be watered
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单项选择题
The fact that Americans like shorter answers tells us______.
A．they reply very quickly in a hurry
B．they choose words too carefully
C．they like replying briefly
D．they want to be as polite as they can
单项选择题
A smaller population may mean______。
A．higher productivity, but a lower average income
B．lower productivity, but a higher average income
C．lower productivity, and a lower average income
D．higher productivity, and a higher average income
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