You don’t try to work hard. You will fail in the e...

Câu hỏi: You don’t try to work hard. You will fail in the exam.            

A Unless you don’t try to work hard, you will fail in the exam.        

B Unless you try to work hard, you won’t fail in the exam.    

C Unless you try to work hard, you will fail in the exam.      

D Unless do you try to work hard, you will fail in the exam.