The workers wore glasses over their eyes to keep them .
A. save
B. safe
C. safely
D. clearly
网友回答
A. save
(答案→)B. safe
C. safely
D. clearly
解析：keep作系动词，有“保持”之意，其后常接复合宾语，表示“使（某人或某物）保持某种状态或使某一动作继续”，即“keep + sb/sth + 形容词”。如： These gloves will keep your hands warm. 这种手套保暖好。根据句意“工人们戴着眼镜来保证他们的安全”，选B。