We must try our best to stop the pollution a happy life.
| A．from live | B．from living |
| C．live | D．to live |
John’s never flown to Canada, ?
| A．is he | B．isn’t he | C．has he | D．hasn’t he |
He hasn’t got a letter from his uncle .
| A．since three months | B．for three months |
| C．three months ago | D．in three months |
It is _____ unlucky day today. I’ve lost _____ useful pen.
| A．a; a | B．an; a | C．a; an | D．an; an |
Can you help me? I have trouble _____ the story in English.
| A．report | B．reporting |
| C．reported | D．to report |