问题补充:
Most experts agree that washing hands regularly is a way to prevent the spread of many diseases.
A. powerful
B. illegal
C. painful
D. awful
答案:
(答案→)A. powerful
B. illegal
C. painful
D. awful
解析:A. powerful强大的;权力大的;(药)有效的,B. illegal非法的,C. painful痛苦的, D. awful糟糕的,可怕的,非常的,极大的,句意:大多数专家同意经常洗手是一个有效防止很多疾病的方式。根据句意选A。