CHUYÊN ĐỀ ĐỘNG TỪ KHUYẾT THIẾU - MODAL VERB

Front

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

Back

must

Front

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

Back

might

Front

This road is very narrow. It ___to be widened.

Back

needs

Front

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

Back

hurry

Front

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

Back

go

Front

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

Back

may

Front

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

Back

should have taken

Front

You ___ ring the bell; I have a key.

Back

needn’t

Front

It must ___ without delay.

Back

be done

Front

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

Back

be able to