While watching television, .
| A．the doorbell rang |
| B．we heard the doorbell ring |
| C．there was someone knocking at the door |
| D．we heard the doorbell rung |
Since the earth’s resources are getting fewer and fewer, recycling industry certainly ____ big benefits in the near future.
| A．promises | B．attempts |
| C．demands | D．invests |
Chinese President Xi Jinping appeared at the Sochi Olympic opening ceremony, China’s strong support for the Olympics and Russia’s efforts to host the Games.
| A．declaring | B．announcing |
| C．sponsoring | D．signaling |
—Can you speed it up a little? I'll be late for my flight.
—________. I'm taking a short-cut. We'll make it on time.
| A．OK, I'll speed it up | B．That’s right |
| C．Take it easy | D．That’s all |
“______ to Michelle and having two beautiful girls in my house never allows me to look down upon women,” said Obama.
| A．Marrying | B．Married |
| C．Having married | D．Being married |
Unfortunately, no one knows ________ prevented the rumor from spreading.
| A．what was it that | B．what it was that |
| C．how was it that | D．how it was that |