【正确答案】:
YET, IT IS OBVIOUS THAT ITS SOCIAL DEVELOPMENT IS LAGGING BEHIND THAT OF ITS ECONOMY.
【题目解析】:本题考查对it引导的形式主语的理解与使用。 yet:但是 it is obvious that...:...很明显 lag behind:滞后,分析句意,应使用现在进行时。
YET, IT IS OBVIOUS THAT ITS SOCIAL DEVELOPMENT IS LAGGING BEHIND THAT OF ITS ECONOMY.