HOW MUCH IS IT. - . ... ALMOST EVERYWHERE. ONE SPECIES HAS BECOME...

21. How much is it. - . ... almost everywhere. One species has become extinct in each year of this century. But many kinds A. It's cost $ 10 B. They are $ 10 C. This is $ 10 D. It's $ 10 are now in danger. Lack of attention would lead to the rapid advance of process of extinction.