CHUYÊN ĐỀ ĐỘNG TỪ KHUYẾT THIẾU - MODAL VERB

You have been reading for four hours. This book ___ be very interesting.

• can
• might
• must
• should

Don’t phone Ann now. She ___ be having lunch.

• might
• can
• must
• has to

This road is very narrow. It ___to be widened.

• might
• needs
• mustn’t
• may

They have plenty of time, so they needn’t ___.

• be hurry
• to hurry
• hurry
• to be hurried

You’re having a sore throat. You’d better___ to the doctor.

• to go
• went
• go
• going

My mother permitted me to go out at night. She said, “You ___ go out tonight.”

• may
• have to
• must
• ought to

He advised me to take an English course. I ___ it early.

• should have taken
• should take
• will have taken
• may take

You ___ ring the bell; I have a key.

• mustn’t
• needn’t
• couldn’t
• shouldn’t

It must ___ without delay.

• be done
• have been done
• do
• be doing

By the time a baby has reached his first birthday, he should ___ sit up or even stand up.

• to be able to
• able to
• to be able
• be able to