We used to see each other ________，but I haven’t heard from him since last year(2012·辽宁)

Mind your steps as you go, or you’llfall down on to the wet ground. —_____________. Don’t mention it B

She is in Canada vacation now.

Chatting on the Wechat (微信) ________me too much time. From now on, I won’t _______much time on it.

The tomato juice left brown ________ on the front of my jacket.