A:contains
B:has contained
C:contained
D:is containing
比一比,再组词。
呼____ 时____ 识____
乎____ 寸____ 只____
中国革命史上第一个农村革命根据地是____ 。
—Have you ever _______ to bring your homework to school?
—Yes. I _______ it at home once last term.