me was so exciting to play that the boy kept hiseyes and attention ________ on it, ruining both a lot

The twins are quite different _________ each other.

Why not take the ____ for your trip —Good idea. I can read it on the train.

Only when your identity has been checked, _____. [ ]

－There ________ a ruler and some books on the desk. Pass me the ruler, please.－Here you are.