Ⅰ.单句语法填空
1．He has made it clear that he won't forgive me even if I apologize to him.
2．The public don't know what the President will do to improve the air quality.
3．This math exercise is so difficult that I really don't know whether I can work it out.
4．The most exciting moment in my life was when I was awarded the prize.
5．My parents are very kind to me and always let me do whatever/what I think I should do.
6．The trouble is that I am anxious to telephone Mr Smith but I have lost his number.
