--__________must be working in the office, I think. --Sure, the light is still on.
I’m good at playing___ football, but Jenny is good at playing___ guitar(吉他).
I have _________ homework to do and I’m _______ tired now.
—She didn’t come to school yesterday, did she? —____, though she was not feeling very well.
Mrs Brown is nice. Every day she tried to cook ______for me during my stay in Canada.
We are going to Beijing. Can you _________when the train will leave ?