We need to be______ the long-term effect of playing computer games too much on children.

A. concerned about B. amazed at

C. threatened by D. tired of

A

【解析】

試題分析：考查短語(yǔ)辨析。句意：我們需要關(guān)注的是過(guò)多地玩游戲?qū)和a(chǎn)生的長(zhǎng)期影響。A關(guān)心，擔(dān)心；B對(duì)......感到驚訝；C受到......的威脅；D厭煩。be concerned about sth/sb關(guān)心/擔(dān)心/關(guān)注......，故選A。

考點(diǎn)：考查短語(yǔ)辨析

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