【題目】 Studies indicate that people are more _______ to suffer from back problems if they sit before computer screens for long hours.

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

【答案】B

【解析】

試題分析：考查形容詞。本句考查固定短語：be likely to do，意為：極有可能做某事。句意為：研究表明，如果人們長時間的坐在電腦屏幕前，那么他們將極有可能有脊椎問題。

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