Living in the central Australian desert has its problems, _____ obtaining water is not the least.
| A．of which | B．for what | C．as | D．whose |
—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 |
—Where did you get this book?
—I picked it up from a secondhand bookshop if you ________ know.
| A．must | B．will |
| C．can | D．shall |
When Harry was at college, he ________ go to the reading room after supper every day.
| A．should | B．might |
| C．would | D．could |