Question

【题目】Theyswaminthepoolyesterday.(用at9:00 a.m.yesterday改写句子)

They ________ ________ inthepoolat9:00 a.m. yesterday.

Answer 1

【答案】were swimming

【解析】

根据at9:00 a.m.yesterday可知句子的时态为过去进行时，用were swimming，故答案为(1). were (2). swimming。