--Someone is knocking at the door. Who may it be?
--It ______ be Tom. He is still in the school.
A. can’t B. mustn’t
C. couldn’t D. may not
Her singing lessons her five hours a week．
A．takes B．spends C．costs D．pays
She __________ an English teacher, but now she is a businesswoman .
A. uses to B. use to be
C. used to be D. used to
We’ve never seen __________exciting film before.
A. such B. so an C. such an D. so
Look! __________ high speed the roller coaster is __________.
A. How; moving B. What; moving
C. How; moving at D. What; moving at
--Smart phones make________ easier and quicker for people to share information.
--I can’t agree more.
A. that B. it C. us D. them
