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Bt:Chọn từ sai
4. Bicycles are cheap and environmental friendly.
A. are
5. I have never read this story ago.
B. cheap
C. environmental
D. friendly
A. never
B. read
C. story
D. ago
6. These children often go to school by foot.
A. These
Ex 6: Complete the following sentence with an appropriate form of the word given.
1. Solar power can be used to
2. There will be a .......
B. often
C. go
D. by
(HOT)
-........ or cool our houses.
(SHORT)
.... of energy in the near future.
...... resources of energy. (EFFECT)
(EASY)
3. Scientists are looking for clean and
4. Solar energy is plentiful, and it can be replaced
5. Nuclear power is expensive and
(DANGER)