______ is a good form of exercise for both the old and the young.
| A．Walk | B．To walk |
| C．Walking | D．The walk |
In the dream Peter saw himself________by a fierce wolf, and he woke suddenly with a start.
| A．chased |
| B．to be chased |
| C．be chased |
| D．having been chased |
Helen had to shout________above the sound of the music.
| A．making herself hear |
| B．to make herself hear |
| C．making herself heard |
| D．to make herself heard |
The driver was still________what had happened when he was sent to hospital, but after a while he lost________.
| A．unconscious for; consciousness |
| B．conscious of; consciousness |
| C．conscious of; conscious |
| D．conscious of; unconscious |
________，I have to put it away and focus my attention on study this week.
| A．However the story is amusing |
| B．No matter amusing the story is |
| C．However amusing the story is |
| D．No matter how the story is amusing |
—Smoking is bad for your health.
—Yes, I know. But I simply can't________.
| A．give it up |
| B．give it in |
| C．give it out |
| D．give it away |