This is perhaps one of _____ important reasons why so many people write ____ poetry.
| A．a ; the | B．the ; the | C．the; 不填 | D．a; 不填 |
When we saw the roadwith snow, we decided to spend the holiday at home.
| A．block | B．to block | C．blocking | D．blocked |
—Has Tom finished his task yet?
—I’m not sure. But he _____ on it last week
| A．was working | B．has been working |
| C．worked | D．had been working |
It was with the help of the local guide the mountain climber was rescued.
| A．who | B．that | C．when | D．how |
Harry is feeling uncomfortable. He _______too much at the party last night.
| A．could drink | B．should drink |
| C．would have drunk | D．must have drunk |
A clean environment can help the city bid for the Olympics, which ________ will promote its economic development.
| A．innature | B．inreturn | C．inexchange | D．infact |