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  3. Anne couldn′t concentrate ______ whatshe was doing while her family were watc...

Anne couldn′t concentrate ______ whatshe was doing while her family were watc...

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问题 Anne couldn′t concentrate ______ whatshe was doing while her family were watching TV.
选项 A.to      
B.on      
C.for     
D.in
答案B
解析考查固定搭配。Concentrate on意为“集中注意力于，专心致志于”。句意为“她家人正在看电视，安妮不能集中注意力在自己正在做的事情上”。
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