Question

【题目】The children are having fun _________ on the beach（海滩）.
A.play
B.plays
C.played
D.playing

Answer 1

【答案】D
【解析】考查固定搭配。A. play 玩耍；动词原形 B. plays 玩耍；动词第三人称单数 C. played 动词过去式 D. playing 动词现在分词。句意：孩子们在沙滩上玩得很开心；玩得开心have fun doing；play使用现在分词，所以答案是D。