giải thích 
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vuvause
B. since
CC. because of
her room every day, her mother
D. as
Question 15. Lan's mother is unhappy now. If Lan
SO
upset.
A. tidy- will be
B. tidies- won't be
C. tidied- would be
D. tidied- wouldn't be
Question 16. The
A. dead
fish are floating in the water.
B. clean
C. nice
D. colorful
pollution can cause high blood pressure, heart problems, sleep disturbances, and
Question 17.
hearing problems.
A. Air
B. Light
C. Water
D., Noise
Ouestion 18 Too muah soaha 1: