According to the data, China supplies more than 90 percent of the world’s rare earth metals, but its reserves only about one third of the world’s total.
20. The rest of his life was devoted ___ pollution ___more happily .
19. --- Could you tell me how the sea sand comes about ? --- Sea waves dash against the rock. In this way , the sea sand ___ .
18. A new ___ bus service to Tianjin Airport started to operate two months ago .
17. Greatly moved by what he did , ____ .
16. My dear , where have you ___? I___ you everywhere .