单项选择题
Who first thought of using bullocks to provide energyA．...
单项选择题Who first thought of using bullocks to provide energy
Which kind of job that the bullocks do is NOT mentioned...
单项选择题Which kind of job that the bullocks do is NOT mentioned in the passage
Why are bullocks used to provide energy in IndiaA．Becau...
单项选择题Why are bullocks used to provide energy in India
