—Car prices have been going down sharply in the last 20 years.
—It's not surprising because the law of market ________ the price of a product.
A．is controlling B．controls
C．has controlled D．controlled
—We'll go to the party to be held in Qinghai Grand Theater at 8 tonight. Could you join us?
—I'm afraid I can't. I ________ the holiday plan with my friends.
A．am discussing B．have discussed
C．will be discussing D．will have discussed
Mother reminds, “________ rain, take an umbrella.” as spring approaches.
A．Shall it B． It shall
C．Should it D．It should
—Jenny took the 8： 00 bus to Guangzhou this morning.
—Really? She ________ the 9：00 train. It's much more comfortable and safer to travel by train.
A．could have taken B．should take
C．must have taken D．can take
—You will never believe that it took us two hours to get to the restaurant.
—Really? You ________ in a traffic jam.
A．needn't have got stuck B．couldn't have got stuck
C．must have got stuck D．should have got stuck
—Jim is very sick these days. He coughs so badly.
—In my opinion, he really ________ listen to the doctor and cut down on smoking.
A．should B．can
C．may D．need
