the problem of land erosion getting more serious the government is searching for a way t

问题补充：

the problem of land erosion getting more serious, the government is searching for a way to deal with it.

A. As

B. With

C. When

D. Because

答案：

A. As

(答案→)B. With

C. When

D. Because

解析：考查with的复合结构，A、C、D三个选项是连词应引导句子，此题是一个with的复合结构做状语，With the problem of land erosion getting more serious,意为随着土地侵蚀问题变得越来越严重，在句中作原因状语。所以选B。