It is the education ________ he received when studying abroad ________ has made him such an excellent manager.
句意：正是他在国外留学时受到的教育使他成为一名优秀的 管理者。首先第二空为强调句型，应填that，排除A、C；再看第一空，空格处是定语从句引导词，先行词为education，做从句中的宾语，用that和which都可以。因此正确答案选B。