Continuing education is a good way to develop new skills or knowledge necessary for a career transition. However, you won’t always need to get (1) __________education when you want to switch

Đáp án: D. additional

Giải thích:

A. vocational (adj.): nghề nghiệp                                  B. singgle-sex (adj.): đơn giới

C. academic (adj.): học thuật                                        D. additional (adj.): bổ sung

Xét về nghĩa, phương án D là phù hợp nhất.