About (one-fifth) of (all) the energy (used) in the United States (are) changed into electric power.（）
A: one-fifth
B: all
C: used
D: are
A: one-fifth
B: all
C: used
D: are
举一反三
- --What does the fresh juice contain? --____of the juice _____orange. It’s very pure. A: One fifth, are B: Four fifths;is C: One-fifth, is D: Four fifths, are
- If you placed all the cans used in the United States in one year end to end, they would reach to the moon and back twelve times.
- Burning waste ______ energy that can be used for electric power or heating.
- 12. Which of these is true about the money they make? A: All of it is used to buy coffee. B: All of it is used to buy coffee. C: All of it is used to buy coffee. D: All of it is used to buy coffee.
- ____ is used to produce electric power.