—What’s the matter with you, Tom?
—______ the ladder, one of arms has been broken.
| A．Climbing | B．While climbing |
| C．To climb | D．While I was climbing |
—____ you got the news that the rocket was sent up successfully?
—From the radio.
| A．How was it that | B．How it was that |
| C．What was it that | D．What it was that |
—Were all the passengers on the bus injured in the accident? —No, _______ only the four who got hurt.
| A．there was | B．there were | C．that was | D．it was |
Facts prove that the world’s economic development is not a win-lose game but one in which all be winners.
| A．can | B．shall | C．must | D．would |
Everyone here will thank the firefighter for the things they have done to prevent fires______ the environment safer.
| A．make | B．to making | C．to make | D．from making |
______ with so many challenges, Yang Guang, a blind young fellow, didn’t give up; he made great efforts to win success.
| A．Facing | B．To face | C．Faced | D．Face |