This is not an economical way to get more water; , it is very expensive.
| A． on the contrary | B． on the other hand |
| C． in short | D． in all |
Nowadays certain limit should be set on use of cars to reduce air pollution.
| A．/; the | B．a; the | C．the; / | D．the; the |
All teachers received warmest congratulations on Teachers’ Day. They felt ________.
| A．an honour that they were teachers | B．that they were teachers an honour |
| C．it an honour when they were teachers | D．it an honour that they were teachers |
A group of Chinese guests, who are the first ________ from the new agreement on tourism between China and Switzerland, were given a warm welcome in Geneva(日内瓦) last Saturday.
| A．benefited | B．benefiting | C．to be benefited | D．to benefit |
House prices vary from place to place and are usually high _____ there are famous schools.
| A．where | B．since | C．when | D．whether |
______seems to be no possibility that the student majoring in liberal-arts can win the first prize in the100-meter race.
| A．What | B．Whether | C．That | D．There |