b)
1.are singing
2.will be driving
3.were having
4.was reading
5.is sleeping
6.aren't doing
7.will be swimming
8.are playing
9.were waiting
c)
1.some, any
2.someone, some
3.anyone, anything
4.everything
5.anyone
6.some
7.any
8.anyone, someone
9,any, some
10.any
11.anywhere
