寻高手解释英语语法题一道
问题描述：
寻高手解释英语语法题一道
There is a new problem involve in the popularity of private cars () road condition need to be improved.我选which答案是that.
答
这里当然选that.因为可见关系代词之后的句子主谓宾一应具全,是做的前面"problem"的同位语而非定语,故只能用that