She ______ into the thick forest alone on such a dark night.

In China when the traffic light is red, you ________ cross the road.

---Be quiet! Mr Smith is coming. --- Don’t worry. It__________be him. Mr Smith is much taller.

There is a “ No smoking “ sign here. You _________ smoke.

Cheating is strictly forbidden in this important exam, and students ______ bring any reference books into their classrooms, cell phones included.