Russia lies______ the north of China.
As civilization______, more and more people have realized the importance of preserving rare animals from extinction.
—How do you _____to her unkindly behavior? —Only silence. Which of the following is wrong?
Burning all the lights in the classroom will be a great______ on electric power.
The environmentalists said wild tiger’s______ on the Thai mountain was a good indication of the better environment.
Although I had read the book assigned by the professor several times, it didn’t make any______ to me.