问题
选择题
She made a silly mistake because she hadn’t kept her on her work.
A．head
B．heart
C．brain
D．mind
答案
答案：D
keep one’s mind on sth.专心于……。类似结构的近义短语为：put one’s heart into专心致志于……，该句意为：她因工作不用心，而犯了一个愚蠢的错误。
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