Introduction modal verbs

2.Practice the grammar

I _____ leave early because I wasn't feeling well.

a.had to

b.must

c.have to

You _____ do something to solve this problem.

a.have to

b. 've to

c.must

I don't like these clothes, but I _____ wear them at work.

a.must

b.'ve to

c.have to

Teacher: 'You _____ arrive on time for class.'

a.must

b.mustn't

c.have to

We didn't have money, so we _____ to find a cash dispenser.

a.must

b.had to

c.have to