【題目】Studies show that people are more ________ to suffer from back problems if they always sit before computer screens for many hours.

A. possible B. supposed C. sure D. likely

【答案】D

【解析】

試題分析：句意：研究表明如果人們在電腦屏幕前坐好幾個小時，就可能會遭受背部疼痛的困擾。A. possible可能的，物體做主語； B. supposed 應(yīng)該的； C. sure確定的； D. likely可能的；人或事物做主語，根據(jù)題干主語是人們，故選D。

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