Study even harder, or you will fail in the examination.

学习再努力些吧，否则你这次考试就会不及格。

youdao

You must study harder (or) else you'll fail in the English examination.

你必须努力学习，不然的话，英语考试不会。

youdao

You must study harder (or) else you'll fail in the English examination.

你必须努力学习，不然的话，英语考试不会。

youdao