Question

【题目】When I passed the river, I saw some children ______ on the sand.

A. play B. were playing C. playing D. played

Answer 1

【答案】C

【解析】试题句意为：我经过小河的时候，看到一些孩子正在沙滩上玩耍。see sb do sth表示看见某人做过某事，see sb doing sth表示看见某人正在做某事。根据语境可知，这里指的是看见孩子正在玩，故应选C。