If you are careful enough, you will _________ make mistakes in your exams.

Must I finish that work today?—-No, you _____. You may finish it in three days.

I _____ walk to school. But this morning I took a bus because I got up late.

I don’t know _______to do next? –It’s easy .Press the red button in 2 minutes.

About ________ of the workers in the factory were born in the ________.