on the 後面加什麼

例句：

I could come next week, or the week after.

我可能下週來，或者再下一週。

I called several times, but only got the answering machine.

我打了幾次電話，但只有電話答錄機答話。

The gene is activated by a specific protein.

這種基因由一種特異性蛋白啟用。

She added a PS asking me to water the plants.

她加了一句附言，要我澆花。

The course is 1 year FT, 2 years PT.

該課程全日制學習一年，非全日制學習兩年。

He didn't give an adequate answer to the question.

他沒有對這個問題作出滿意的答覆。