Webegantoopentotheoutsideworldinthelate1970s.    ,ther...

问题详情：

 We began to open to the outside world in the late 1970s.     ,there have been great changes in the country.

   A. As a result of        B. As a result     C. First of all          D. After all

【回答】

B

知识点：副词

题型：选择题