The letter was passed from one to until everyone had read it
| A．the other | B．others | C．other | D．another |
Los Angeles Times reported that researchers may have found a way to _________ human life by changing certain genes, so that humans might expect to live twice as long.
| A．extend | B．preserve |
| C．multiply | D．transform |
A 19-year-old teenager from Guangdong nicknamed Niko demanded an apology from Youku, which he believed violated their copyrights as it used his team's photos without _________.
| A．appreciation | B．approval |
| C．assistance | D．assessment |
The lower production levels are a _________ of dissatisfaction among the workers, so it’s time to raise their salary.
| A．symptom | B．recognition |
| C．potential | D．tendency |
________in space by ordinary citizens will be common.
| A．Travel | B．Travelling |
| C．Travelled | D．To travel |
—Are you free，Jane？Let’s go to watch the movie.
—Well，time is________；the real problem is that I haven’t got much money.
| A．the major issue | B．the question |
| C．not the issue | D．out of the question |