Without facts,we cannot form a worthwhile opinion,for we need to have factual knowledge ______ our thinking.
| A．upon which to base | B．which to be based on |
| C．which to base on | D．to which to be based on |
John plays football _____, if not better than, David.
| A．as well | B．as well as | C．so well | D．so well as |
Although he is considered a great writer,
| A．his works are not widely read | B．but his works are not widely read |
| C．however his works are not widely read | D．still his works are not widely read |
___ the day went on, the weather got worse.
| A．With | B．Since | C．While | D．As |
—What was the party like?
—Wonderful. It' s years _____ I enjoyed myself so much.
| A．after | B．when | C．before | D．since |
It was not _____ she took off her dark glasses _____ I realized she was a famous film star.
| A．when; that | B．until; that | C．until; when | D．when; then |