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

问题补充：

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

A. As a result of

B. As a result

C. First of a11

D. After all

答案：

A. As a result of

(答案→)B. As a result

C. First of a11

D. After all

解析：考查固定词组，D．After all毕竟C．First of a11首先A．As a result of…的结果B．As a result结果，句子意思“在上世纪70年代我们开始对我开放，结果在我们国家有很大的变化”