Chọn đáp án đúng nhất

6. I often
A. study
7. Look! They
A. play
8. My father usually
A. is going
9. Children
A. collected
10. My parents
A. buy
my homework after school.
B. am doing
C. do
badminton with their friends.
C. playing
B. plays
to work by bus.
C. goes
B. go
plastic bottles for recycling a month ago.
C. is collecting
B. collect
D. does
D. are playing
D. going
D. to collect
me a new bike on my last birthday.
C. buys
B. bought
not tonse or form of the verb in parentheses (0,75pt):
D. is buying