Our class____(visit)the Palace Museum teice last year.
问题描述：
Our class____(visit)the Palace Museum teice last year.
答
Our class____(visit)the Palace Museum teice last year.
答案：visited，
答
visited
答
Our class_visited___(visit)the Palace Museum teice last year.
因为后面有last year（去年）这是个过去时的句子,所以动词用过去式.