If you don't prepare the lesson carefully, you will get a bad mark. * Unless = If . not ( Trừ khi). If he doesn‟t come, I will bring this package to him.
If you don't prepare the lesson carefully, you will get a bad mark. * Unless = If . not ( Trừ khi). If he doesn‟t come, I will bring this package to him.
If you don't prepare the lesson carefully, you will get a bad mark. * Unless = If . not ( Trừ khi). If he doesn‟t come, I will bring this package to him.