二、单项填空（共18小题；每小题0.5分，满分9分）
从A、B、C和D四个选项中, 选出可以填入空白处的最佳选项。
17. Mr. Wang would have continued to lead _____ poor life instead of changing his lifestyle if he hadn’t met Mr. Smith by _____ chance who was a businessman.
A. the; a B. a; the C. a; / D. /; the
18. Don’t _____ women. They are as important as men for the development of society.
A. look up to B. look down upon C. look out for D. look forward to
19. She has already tried her best. Please don't be too _____ about her job.
A. special B. responsible C. unusual D. particular
20. —Nanjing is famous _____ its long history, right?
—That’s true. It is famous _____ the capital city of six dynasties.
