Question

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

Answer 1

A

动词辨析，主语是people，不能和possible，probable 连用，排除B,C；be sure to do,表示一定要，务必，不符合句意。所以选A。be likely to do sth.,很可能会怎样。