Yang Liwei_____about twenty-one hours in_____around the earth fourteen times.
| A．took; going | B．spent; going |
| C．cost; to go | D．took; to go |
—Look at the monkeys running around on the rocks together.
—Yes, the environment ______ to suit them very well. Let's see the tigers now.
| A．seems |
| B．feels |
| C．looks |
| D．goes |
—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 |