have you been studying in this school?-Since two years ago.[ ]

Various ways have been provided for us to solve the problem. We can choose _____to start with.

Where ________ you last night? I called you, but got no answer.—Sorry. I ________ out with my brother.

Who is ___________ man under the tree?

What a nice coat! How much did you_____ for it? It_____ me twenty yuan.