should or must

You _____________ always tell the truth.

• must

• should

You ____________ write with a pen but a pencil is OK.

• must

• should

They _____________ watch this TV programme if they have time.

• should

• must

You _____________ never shout at your parents.

• should

• must

You _____________ run in the pool area.

• mustn't

• shouldn't

We _____________ take photos inside the museum because it is forbidden.

• should not

• must not

I think you ____________ go to the doctor because you look pale.

• should

• must

You _____________ buy the blue jacket because it suits you perfectly

• should

• must

I _____________ get up early tomorrow because I need to study.

• should

• must

I don't think you ____________ work so hard.

• should

• must