EN129_GRAM_15.1 & 16.1

All students ___ wear uniforms at school because it is a rule

• must

• have to

• ought to

• can

You ___ finish your homework before you go to bed

• have to

• must

• should

• need

This drink isn't beneficial for health. You ___ drink it too much

• ought not to

• ought to not

• should

• musn't

This warning sign indicates that you ___ step on the grass

• don't have to

• shouldn't

• mustn't

• ought to not

I think you ___ do exercise regularly in order to keep your body in good shape

• must

• should

• ought to

• B & C

I will lend you some money, but you ___ pay it back to me next week

• should

• musn't

• must

• have to

Hoa ___ feed the cats because her mother has done it already

• must

• doesn't have to

• has to

• musn't

Those audiences ___ show their tickets before entering the concert hall

• must

• have to

• don't have to

• mustn't

The children ___ spend too much time playing computer games

• mustn't

• ought to not

• shouldn't

• B&C

In case you're suffered from the injury, you ___ see the doctor today

• have better

• had better

• must

• ought