单项选择题

What do plants do when they are thirsty

A．They give out faint cries.
B．They make noises to drive away insects.
C．They extend their water pipes.
D．They become elastic like rubber bands.
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单项选择题
What plants do many insects tend to attack
A．Quiet plants.
B．Well-watered plants.
C．Healthy plants.
D．Thirsty plants.
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What is the Speaker mainly talking about
A．Three groups of learners.
B．The importance of business English.
C．English for Specific Purposes.
D．Features of English for different purposes.
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