1. Unless we protect the enviroment, we will destroy ourselves
⇒ If......
2. Unless she is more hard- working, she will get low marks
⇒ If......
3. Unless he listens to his parents, he will fail
⇒ If......
4. They began watching the movie one hour ago
⇒ They have.............
5. He last cried ten years ago
⇒ He has....
Loga
Sinh Học lớp 12
