Choose the correct answer:

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----- Nội dung dịch tự động từ ảnh -----
9. Normally my mother
with her sister.
A. works/ goes
visiting
C. visited
in the morning but today she
B. is working/ is going
10. What's that strange sound? - Oh, the workers.
A. put
B. were putting
11. My younger brother
A. has
12. My teacher
A. attends
13. The world
A. runs
14. Reducing the use of air-conditioners,
B. helped
A. helps
music lessons three times a week.
B. had
a conference on green energy last month.
B. attended
C. is attending
out of fossil fuels. We can't depend on them forever.
B. ran
C. is running
15. People in some developing countries.
A. use
B. used
shopping
C. works / is going
the solar panels on our roof.
C. are putting
C. is having
us save a lot of energy and money.
C. is helping
biogas at the moment.
C. are using
ntinuous tense.