MUST

We use MUST to express the same meaning as "HAVE TO".
We have no choice.
People must eat if they want to live - no choice.
People must not drink and drive - you cannot do it.

Choose MUST or MUST NOT for these sentences.
1-In England you ______drive on the left.
2-Flowers______have water to live.
3-You ______say "he have" but you _______say "he has".
4-You______use "ing"after a preposition.
5-People ______drive without a driving licence.

Answers: must/must/must not/must/must not/must not.

See you!