一、单项选择。 从每小题所给的A,B,C, D四个选项中选出可以填入空白处的最佳选项（共20小题，每小题1.5分 满分30分）
（ ）1. Where ______ the post office?
A. are B. is C. does D. do
（ ）2. He usually ______20 hours every day.
A. relax B.eat C. relaxes D. sleep
( ) 3. There is ______ old park near my house.
A. a B. / C. an D. and
