A nation’s greatest wealth is the industry of its people.______

A.China’s water, grassland and sloping land resources are rich and the potential for exploitation is great.
B.Rich in water, grassland and sloping land resources, China’s potential for exploitation is great.
C.China has rich water, grassland and sloping land resources, which have great potential for exploitation.
D.China’s water, grassland and sloping land resources which have great potential for exploitation are rich.

A.China has a grassland area of 390 million hectares, of which about 320 million hectares can be used, which places China third in the area of usable grassland.
B.China has a 390 million hectares grassland. In the grassland, about 320 million hectares can be used, and it place China third in the world in the area of usable grassland.
C.There is 390 million hectares grassland in China, of which about 320 million hectares can be used, which places China third in the world in the area of usable grassland.
D.There is 390 million hectares grassland in China. Among these hectares, we can use about 320 million hectares, and it makes china ranking the third in the world in the area of usable grassland.