The performance was a great success because the orchestra was by an internationally famous conductor.
| A．directed |
| B．performed |
| C．conducted |
| D．staged |
----Oh, my God I can’t help worrying about my school report.
----____ .You can do nothing but wait.
| A．Take your time | B．Go ahead |
| C．Good Luck | D．Relax |
—I didn’t know this was a one-way street, officer.
—________.
| A．That’s all right. | B．I don’t believe you. |
| C．How can you say that? | D．Sorry, but that’s no excuse. |
It seems that living green is __________ easy and affordable. A small step makes a big difference.
| A．exactly | B．fortunately | C．surprisingly | D．hardly |
It was in the small house _____was built with stones by his father ____he spent his childhood.
| A．which; that | B．that; where | C．which; which | D．that; which |
__________ environmental damage is done, it takes many years for the ecosystem(生态系统) to recover.
| A．Even if | B．If only | C．While | D．Once |