Viết lại câu:
1.If we don't try our best,we won't get good marks.
= Unless .................................................................
2. I started learning English four years ago.
= I have ......................................................
3. She has taught English since 2015.
= She started ..................................................
4. No one in the group is taller than Ha.
= Ha is ...........................................................
5. The last time I visited my unile was 2 months ago
= I haven't ..................................................................