People try to avoid public transportation delays by using their own cars , and this
creates further problems .
| A．in short | B．in case | C．in doubt | D．in turn |
Scarcely was George Washington in his teens _____ his father died.
| A．than | B．as | C．while | D．when |
_____ David goes, he is welcome.
| A．Whichever | B．However | C．Wherever | D．Whatever |
The house stood _____ there had been a rock.
| A．which | B．at which | C．when | D．where |
Small _____ it is, the pen is a most useful tool.
| A．because | B．so | C．if | D．as |
After the new technique was introduced, the factory produced _____ tractors in 1988 as the year before.
| A．as twice many | B．as many twice |
| C．twice as many | D．twice many as |