—Is this your brother? —No,_______
| A．he isn’t | B．it isn’t |
| C．that isn’t | D．this isn’t |
John ______ leave for New York tomorrow, but I’m not sure.
| A．must | B．may |
| C．could | D．need |
Be careful with the knife, ______ you’ll be hurt.
| A．so | B．or | C．but | D．because |
— ______ do you go to the gym?
— Twice a week
| A．How often | B．How soon |
| C．How many | D．How long |
— Where is Jenny?
— She is doing her homework ______ the classroom.
| A．of | B．on | C．in | D．to |
Mike lost his key. ______ couldn’t enter the room.
| A．He | B．She | C．They | D．It |