It is said the cost of medical care today is ten times as ____ as it was ten years ago.
| A．expensive | B．big | C．high | D．tall |
—It’s dangerous to swim here. Look at the sign!
—Oh, I _______ it.
| A．didn’t notice | B．don’t notice |
| C．hadn’t notice | D．haven’t notice |
—Will you give me a hand? I have some trouble_______ the scientific problem.
—Don't worry. I'll try my best to help you _______.
| A．solving; in five minutes |
| B．to solve; in five-minute |
| C．to solve; after five minutes |
| D．solving; after five-minutes |
You’dbetter_______yourcigarette when you are in the wood.
| A．puton | B．putup |
| C．put out | D．put off |
—What will the weather be like tomorrow?
—It _______ be rainy, cloudy or sunny. Who knows?
| A．must | B．might |
| C．shall | D．should |
—_______ are you leaving for Shanghai?
—In a couple of months.
| A．How long | B．How often |
| C．How soon | D．How fast |