Studies show that office workers are more to suffer from backache because they always sit

问题补充：

Studies show that office workers are more to suffer from backache because they always sit before computer screens for long hours.

A. surely

B. likely

C. probable

D. possible

答案：

A. surely

(答案→)B. likely

C. probable

D. possible

解析：考查形容词。本题考查短语be likely to do有可能做，句意：研究表明：办公室人员更有可能患背疼，因为他们总是坐在电脑屏幕前几个小时。