Choose the correct answer

----- Nội dung dịch tự động từ ảnh -----
12. I'm very tired,. . I have to finish our homework before going to bed.
b. therefore
a so
c. however
d. but
13. Nowadays people are.. . the rainforests of the earth seriously.
b. producing
c. protecting
d. replacing
a. destroying
14. To save energy in the kitchen, I think you should....... food carèfully before turming on the stove.
a keep
c. preserve
d. prepare
b. story
15. Scientists are looking for an effective way to reduce energy..
b. installment
c. consumption
saving methods and inventions to use solar energy.
d. necessity
a. storage
16. There are
a. energy
b. energetic
c. effective
d. productive