You might wonder how this kind of animal ____ to live without eating for so many months.
| A．keeps | B．succeeds | C．manages | D．tries |
My newly-purchased magazine is nowhere to be found. ______ I have left it on the train?
| A．Could | B．Should |
| C．Must | D．Would |
—Did your mother sleep well last night?
—She ______ have slept through all those noises.
| A．mustn't | B．may not |
| C．can't | D．won't |
Don't use water to put out the fire if oil catches fire. As is known, oil ______ float on water.
| A．shall | B．must |
| C．may | D．will |
—Lisa is going traveling at the cost of losing her job.
—Really? She ______ a lot of money.
| A．must save | B．might save |
| C．must have saved | D．might have saved |
—Jenny took the 8:00 bus to Shanghai 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 |