、单项填空 在A、B、C、D 四个选项中，选出可以填入空白处的最佳答案。（本大题共14 分，每小题1分）
( )1. Before I talked with ______ scientist, I had never met______ clever person like him.
A. the; a B. a; a C. the; the D. a; the
( )2. —I’m afraid that I can’t do it.
—Oh, you should believe in yourself. You won’t know what you can do______ you try it.
A. if B. because C. until D. while
( )3. Did your father tell you ______?
A. when he travelled to Hong Kong B. how he goes to Shanghai
C. where he has spent his holidays D. why did he visit Hangzhou
