你好,同学
正确答案：选A. in addition to 除了.之外
即：In addition to his job at the university, he's now running his own research company.
翻译：除了在大学的工作,他现在在经营自己的研究公司.
解析：in addition (to sb/sth): as an extra person, thing or circumstance 加之,除...外. 如：
In addition (to the names on the list) there are six other applicants.
除此(名单上的名字)之外,还有六个申请人..
except (for sb/sth);(that...) not including (sb/sth);but not 除了(某人/某事物)之外(表示所说的不包括在内) 如：
I can answer all the questions except for the last.
所有的题我都会答,只是最后一题不会.
希望能帮到你,祝更上一层楼O(∩_∩)O
有不明白的请继续追问,可以详谈嘛(*^__^*)