Can you guess _________ the new Nike sports shoes? — Yes, Maybe he asked his grandpa to pay for them, I think.

I have to buy _________of the two books because I don’t know which to choose.

Will you take part in the English speech competition tomorrow?—Sure. I see as a chance to prove_________.

I have to go to my guitar lesson____ 19:00 ____20:00____ the evening. [ ]

I like English best. What about _______?–He thinks science is very interesting. His favorite subject is science.