摘要： -Where can we go into the trade center? -Haven’t you seen the sign over there? A. B. C. D.

网址：http://m.1010jiajiao.com/timu_id_2346268[举报]

[ ]

--Where can we go into the trade center?

--Haven’t you seen the sign ________ over there?

---Where can we go into to trade center?
---Haven't you seen the sign ______ over there.

---Where can we go into to trade center?---Haven't you seen the sign ______ over there.