—How much shall I pay for the telephone call?
—You _____. It's free.
| A．mustn't |
| B．shouldn't |
| C．don't have to |
| D．can't |
—Why did you plant so many trees?
— ______ the environment.
| A．Improve |
| B．To Improve |
| C．Improved |
| D．Improving |
—Can we finish the work with ______ money and ______ people?
—I'm afraid it's impossible.
| A．less; fewer |
| B．few; less |
| C．less; less |
| D．fewer; fewer |
—Computer is so useful. It can do almost everything.
—Yes, but it ______ what to do.
| A．will tell |
| B．has known |
| C．must be told |
| D．is told |
That building is now a supermarket. It ______ a cinema.
| A．was |
| B．is used to be |
| C．used to be |
| D．would be |