Ⅲ.单项填空 1.Studies show that people are more ________ to suffer from back problems if they always sit before computer screens for long hours. A. likely B. possible C. probable D. sure 【解析】 A 考查形容词的用法区分。根据句子意思表示可能性,排除D;另外,sb. is likely to do sth.这一句式中,不能用possible和probable,它们可用于:It is possible/probable that…