We have great socks very good prices.A、in B、at C、on
When I was walking in the street, I saw a plane___________ over my head.
We ___________ when the teacher came in.
I will let you know about it as soon as I _________ the news.
Beijing has ________ many buses that there is often a traffic jam in rush hours.
— Hello, you look tired today. —Yes, I slept too late yesterday evening. I my homework and forgot the time.