for...
..., as a result, ...
..., accordingly, ...
..., consequently, ...
考察单词短语: so意为所以, 后接结果. A选项for...接原因,表示因为...; B选项..., as a result, ...结果...; C选项..., accordingly, ...因此; D选项..., consequently, ...因此.... 故选A.
