— How long do you think it is _____ he took up the job? — Half a year at least. |
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A. when B. before C. that D. since |
— How long do you think it is?
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— How long do you think it is?
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你能帮帮他们吗
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青少年如患有近视眼,应配戴由______制成的眼镜进行视力矫正;中老年如患有远视眼,应配戴由______制成的眼镜进行矫正.
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