Today computers ______in both cities and towns.
| A．were using | B．are used | C．were used | D．are using |
It’s_____to speak loudly while you are eating.
| A．good | B．polite | C．supposed | D．rude |
What_____your cousin that evening?
| A．happened to | B．has happened to |
| C．was happened | D．happened with |
_____the time I got to the bus stop, the bus had already left.
| A．At | B．In | C．For | D．By |
---Don’t worry. Your brother is coming to help you.
---________ he doesn’t come?
| A．What about | B．Why not |
| C．What if | D．What for |
---Listen! Peter is singing in the classroom!
---It _____ be him. He has gone back to his hometown.
| A．must | B．mustn’t |
| C．may not | D．can’t |