–Look at the sign! It says “No Smoking”.--Oh, sorry. I ____it.
— _________ did you do with old books? — I sent them to children in poor areas.
— What______useful dictionary for beginners of English! Where did you get it? — I bought it in the bookshop.
— I visited the Purple Mountain Observatory last Sunday. —Why didn’t you tell me earlier?
There’s milk in the fridge. Let’s go to buy some .
Is the computer ? We don’t have to buy it .