I’ll only help you if you promise to try harder.

A. Unless you promise to try harder, I will not help you.

B. If you don’t try harder, I promise to help you.

C. You promise to help me if I try harder.

D. Unless I promise to help you, I will try harder.

Đáp án
A. Unless you promise to try harder, I will not help you.

Câu hỏi thuộc Bài tập:

[070] - Trọng tâm kiến thức luyện thi Khối 6 Chuyên - Chuyên đề 9: Exercise 2