Grand ma is now at .
| A．the doctor’s | B．the doctors | C．the doctor | D．doctor’s |
The old lady didn’t know when the house caught fire.
| A．how to do | B．how to do with it | C．what to do | D．what to do it |
— Don’t forget to close the door when you leave the room.
— No, I .
| A．don’t | B．won’t | C．mustn’t | D．can’t |
Though I live in the forest . I don’t feel.
| A．lonely, lonely | B．alone, alone | C．alone, lonely | D．lonely, alone |
If there are trees, the air in our city will be cleaner.
| A．less, more | B．more, more | C．more, much | D．much, more |