David got a higher grade in the final exam, for, you see, he made________mistakes.
| A．few | B．fewer | C．little | D．less |
_____ 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 |
The piano in the other shop will be _____, but _____.
| A．cheaper; not as better | B．more cheap; not as better |
| C．cheaper; not as good | D．more cheap; not as good |