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  3. Anne couldn’t concentrate______what she was doing while her family were watching TV.

Anne couldn’t concentrate______what she was doing while her family were watching TV.

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问题 Anne couldn’t concentrate______what she was doing while her family were watching TV.
选项 A、to
B、for
C、on
D、in
答案C
解析 本题考查固定搭配。concentrate on为固定搭配，意为“集中，全神贯注于”。
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