I _____ Wang Tao in the street yesterday. We _____ each other since he went to Beijing.

A．met, didn’t seen

B．have met, hadn’t seen

C．met, haven’t seen

D．met, hadn’t seen

下列动物中，全属于无脊椎动物的一组是（）。

A.家鸽、壁虎、青蛙

B.蝗虫、蚯蚓、蜈蚣

C.鲫鱼、家兔、螳螂

D.蚂蚁、蜜蜂、鲨鱼