How much did the company donate to build the school library?— About three ______ yuan．

Alison, I’m sorry. I can’t come to the wedding with you tomorrow morning. — ________? — My grandma was severely ill, so I have to stay in the hospital to look after her.

Which is ____________, the telephone, the computer or the light bulb?

Jim is tall but Tom is——taller.

How many teachers are there in your school? —I’m not sure about it. Maybe.