Could you tell me __________？—Sorry, I don’t know.

I don’t know _________, but I guess he may be a doctor.

Jet Li to Guangzhou for charity . He’ll come back in two days.

There is no doubt ______ everyone will unite and work for better days.

Do you want to go hiking with me this weekend? –I’d love to. But I have to ________ my little brother at home.