1 are going
2 are having
3is reading
4 are doing
5 are brushing
6 are travelling
7 isn't doing, is sleeping
8 aren't working, are doing
9 isn't doing,  is watching
10 Is Nga reading
11 Are they playing
12 Are the children washing
13 Is your mother travelling
14 is Mr Hung reading, is listening
15 Is she travelling

Bài 1:
1.going
2.having
3.reading
4.doing
5.brushing
6.traveling
7.not doing
   sleeping
8.not working
9.not doing
10.reading
11.playing
12.washing
13.traveling
14.reading
    listening
15.traveling