Modal verbs : Can-Could-Should-Must

The traffic light is red. We ___ stop.

• must

• can

• shouldn't

• will

We ___ leave the house without locking the door.

(leave: Rời đi; without: Mà không)

• should

• must

• can

• shouldn't

You ___ stay near the fire.

• should

• can

• shouldn't

• must

You ___ always tell the truth.

(truth: Sự thật)

• shouldn't

• can

• must

• can't

You ___ be polite to your elderly.

(polite: Lịch sự)

(elderly; người già)

• can't

• must

• shouldn't

• can

You ___ practice your reading every day.

• shouldn't

• should

• can't

• mustn't

You ___ finish your homework before playing games.

• must

• can't

• can

• mustn't

We ___ talk loudly in the library.

• mustn't

• must

• should

• can

You ___ eat vegetables to stay healthy.

• should

• mustn't

• can't

• shouldn't

Nam ____ play guitar skillfully.

• can

• should

• shouldn't

• mustn't