Tham Gia Group Dành Cho Lớp 7 Chia Sẻ, Trao Đổi Tài Liệu Miễn Phí
1. By the middle of the 21* century, people in developing countries
more renewable energy.
B. will be using C. used
2. The wind, the sun, and the wave are some types of
A. uses
D. have used
sources
of energy.
A. changeable B. alternative
3. Alternative sources of energy
A. is
C. cheap
...