what happened______ your litter dog?I haven't seen it these days _英语解答

what happened______ your litter dog?I haven't seen it these days A with B in C of D to

人气：342 ℃　时间：2019-08-20 09:30:33

解答

to
happen to发生,固定搭配
你的小狗发生了什么?我这些天都没看到它