中国现有草地面积 3.9 亿公顷，其中可利用面积 3.2 亿公顷，居世界第三位。（ ）
A、There is a 390 million hectares grassland in China. In the grassland, about 320 million hectares can be cultivated, and it places China the third in the world.
B、China has grassland area of 390 million hectares, of which about 320 million hectares can be cultivated, which places China the third in the world.
C、China has grassland area of 390 million hectares, of which about 320 million hectares can be cultivated which places China the third in the world.
D、There is 390 million hectares grassland in China. In the grassland, about 320 million hectares can be cultivated, places China the third in the world.
【正确答案】：B
【题目解析】：非限制性定语从句的考察，原句最好能用一句话翻译出来，借用定语从句，其中翻译成of which, B选项的第二个which指的是前面的一整句话。而C选项的第二个which前没有逗号，导致修饰的成分变了。故选B。
