The problem of become a serious one.? A.dealing with waste plastics have B.deal
来源：网络
时间：
推荐文章
The problem of ________ become a serious one.?
A.dealing with waste plastics have
B.deal with waste plastics have?
C.dealing with waste plastics has
D.to deal with waste plastics has
试题答案
C
在一个比较复杂的句子中，首先找出句子的主干。在这句话中，句子的主干应该是The problem has become a serious one.句意是“如何处理塑料成为一个重要的问题”。of是介词，后面要跟动名词作宾语，所以可以排除B和D两项；然后找出句子的主语，the problem,所以谓语动词应该用单数，不能选A,所以答案是C。