20. —Why was __ you lost all your keys？
—It was because of my carelessness.
| A．that | B．what | C．it that | D．One |
During his first trip to China, President Obama discussed some key global issues such as economic recovery, climate change, _______ nuclear weapons in his talks with Chinese President Hu Jintao.
| A．and stopping to spread | B．to stop spreading |
| C．to stop to spread | D．and stopping the spread of |
The Niagara Waterfalls, _____ is shaped like a semicircle, are 670meters wide, and fall 56 meters in an awesome white sheet of water.
| A．which | B．where | C．the largest of which | D．in which |
Failure hurts grown-ups and childre
n___________，but it can make a positive contribution to your life once you learn to use it.
| A．actively | B．likely | C．alike | D．similarly |
Toyota Motor President Akio Toyoda on Monday apologized to Chinese consumers , who ________ the world's biggest auto market , over the company's massive global recall.
| A．make up | B．bring up | C．put down | D．set down |
The Los Angeles district attorney on Monday charged Michael Jackson's personal physician, Conrad Murray, ______ involuntary manslaughter
in connection with the pop icon's death in June.
| A．of | B．for | C．with | D．as |