I am very worried because my son ________ most of his spare time ________ playing games on the computer.
A.concentrates;on | B.concentrates;in |
C.focuses;to | D.focuses;in |
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I am very worried because my son ________ most of his spare time ________ playing games on the computer.
A.concentrates;on | B.concentrates;in |
C.focuses;to | D.focuses;in |
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