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I've already finished all my work, so I _______ study tonight. I think I'll read for a while.

• don't have to

• have to

• must

• mustn't

I ______ forget to take my key with me.

• must

• mustn't

• don't have to

• have to

Johnny! You _______ play with sharp knives. Put that knives down immediately!

• don't have to

• have to

• mustn't

• must

Before an operation, all patients ______ sign a consent form, or the surgeon will not perform the surgery.

Sorry. Julie and I _______ leave the party early.

A person _____ eat balanced diet.

• has to

• must

• have to

• should

Walking is good exercise. You say you want to get more exercise. You _____ walk to and from work instead of taking bus.

Which sentence is stronger?

• You have to wear your seatbelt.

• You must wear your seatbelt.

Which sentence is stronger?

• We have to bring our own pencils.

• We should bring our own pencils.

_____ I borrow your pen? (formal polite request)

• May

• Can

• Could

• Would