我遇到了一個難題用英文怎麼説，難題的英文怎麼寫

1

十四歲的時候，我遇到了一個難題。

When I was fourteen, I had my first big dilemma.

2

我遇到了一個難題：我常常擔心考試結果，經常考完試後好幾天都在想這個問題。

I had a problem: I always worry about the examination results, often after examination for several days after in to this.

3

這天，我坐在窗前，依舊像往常一樣寫作業，可是還沒寫多少，我就遇到了一個難題。

This day, I sat at the window, still as usual writing homework, but haven't write how many, I faced with a puzzle.