2.C

1.C.is watching 

2.C.brush 

3.C.watching

4.C.never

C. 59

2

B

D

12.go - go

13.am writing 

14.have - go

15 have

Exercise 5:

 1.Mary has become a teacher for 5 years

2.My father is watering some plants in the garden 

3.It will rain in the arternoon 

4.My brother goes to work by car every day

5. My mother often eats oat in lunch

Không, thầy ấy tính đúng rồi