用括号内的词的适当形式填空

问题描述:

用括号内的词的适当形式填空
1.Who's _____(drive) that car,do you know?
2.May I have some ____(piece) of paper,please?

1,driving(谁正在开那辆车,你知道吗)用的是进行时态
2,pieces(我能借你几张纸头吗?)是几张纸头,所以用复数.