单项选择题

Wireless waste from cell phones, pocket PCs, and music players（）special problems because they have toxic chemicals in batteries and other components.

A. pose
B. commit
C. transport
D. expose

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单项选择题
What is it that the author wants to （）to his readers through the story

A. convey
B. convince
C. convert
D. conform
单项选择题
I was（）to learn that you are going to spend the summer with your parents in Hong Kong

A. disgraced
B. distracted
C. thrilled
D. bleached
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