It’s a common sense _____ Canberra, _____ between Sydney and Melbourne, is the capital of Australia.
--Who did you ___ in the street last Sunday?---Lin Tao, a good friend of mine.
Something ___ to save our earth. Do you think so?
I’ m sorry, I mistook you ___ your sister ___ mistake.
The scientists are trying to ___ natural energy to decrease air pollution.
China is ___ the east of Asia while Japan is ___ the east of China.