22.--- What ______ his parents doing --- _______ having lunch.A.i_英语解答

22.--- What ______ his parents doing --- _______ having lunch.A.is,He’s B.is,He C.are,They’re D.are,They

人气：474 ℃　时间：2019-10-11 17:13:13

解答

C. 考察现在进行时的用法
现在进行时的结构是：be doing