来 or 去

We use 来 and 去 to describe the direction of a verb. 来 or 去. The most basic (and common) form of direction complement is formed by a verb and 来 or 去:Verb + 来 or 去. The most important thing to consider with direction complements is the position of the speaker:

• If the action moves towards the speaker or comes closer in any way, use 来. 
• If the action moves away from the speaker or becomes more distant in any way, use 去.

 Here are some examples:

Please filling the blanks by using 来 or 去. 我 在 楼上，请 你十分钟以后上_____。 I'm on the upper floor. Please come up in ten minutes. 在树上 玩 很 危险，你 快下_____! It's too dangerous to play in the tree! Come down! 你在楼上等我一下。我一会儿就 上_____找你。I'm on the lower floor. Please come down to me. 我在楼下，你赶快 下_____吧。I'm on the lower floor. Please come down to me. 里面 人太多了，你们 出_____透透气吧。There are too many people inside there.You guys need to get out and use some fresh air. 我们 在 里面 开会， 大家都 进_____吧。We are going to have a meeting inside.Please come in here. 他们 在 外面，咱们 出_____ 跟 他们 见面。They are outside. We should go out and meet them. 他 在 办公室里 等你，你 快进_____  吧。He is waiting for you in his office.You can go in now. 你 什么时候 回_____  ? When are you coming back? 他 明天 一个人回_____  。He is going back alone tomorrow. 你 过_____  把你的东西收拾好。Come here and put away you own stuff. 我 看到 马路对面 新开了 一家 蛋糕店,就 走 过_____  了。I saw a new cake shop on the other side of the road and then I went up to it.

http://resources.allsetlearning.com/chinese/grammar/Direction_complement