问题
选择题
Tim’s mum is worried _______ her son’s eyesight as he plays online games too much.
A．for
B．about
C．with
D．of
答案
答案：B
考查介词用法。短语：be worried about 担心…，句意：提姆的母亲很担忧她儿子的眼睛因为他网上玩游戏玩得太多。所以选B。
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