选择正确的单词完成句子或对话。
1.Look at the traffic _________ (a light / lights), Su Nan.
2.The light is _________ (yellow / green). You can go.
3.Let's _________ (go / going).
4.—Are you going to the _________ (shop / bookstore)?
—Yes. I'm going to buy a book _________ (for / to) my sister.
5.—Don't stop here.
—All _________ (right / left).