I will do badly in my exams,____
study harder.

1.if I'm not
2.if I wasn't
3.if l don't
4.if I haven't​

Ответ:

3. if I don't

Объяснение:

The correct option is: 3. if I don't

So the sentence would be: "I will do badly in my exams, if I don't study harder."