Chọn một phương án đúng (A, B, C hoặc D) để điền vào chỗ trống trong đoạn văn sau.

One thing that was really a turning point for me was when I learned Spanish. I was always kind of scared of learning a foreign language, yet I was really envious of kids (1) ______ could speak another language. When I started learning Spanish, (2) ______, I found that I was pretty good at it. The moment I reached that breakthrough stage - you know, when you discover you can actually speak and (3) ______ with people in the language - I felt really proud of myself. I realized that learning a foreign language was not an impossible thing after all. Now I can speak three: Spanish, Italian, and German. And I am (4) ______ Korean this year.