题目

The doctor was ______ immediately the little boy fell off a ladder and hurt himself. A. asked for          B. sent for            C. waited for         D. cared for 答案：B 解析: send for sb.请某人来；ask for sb.找某人；wait for等候；care for照料(=look after)、喜欢(=like用于否定句或疑问句中)。圆形可以密铺。（_______）