---Cathy seems to be very happy.
---Surely she is. Having passed all the tests, she felt a great weight off her mind.
| A．taking | B．taken | C．take | D．to be taken |
Although nuclear power may lead to disasters, ______ the nuclear power industry has been operating safely for three decades in China.
| A．and | B．but | C．so | D．yet |
The way he acted towards people was to keep on good terms with them ______ principle, which was usually thought little of.
| A．at the mercy of | B．at the risk of |
| C．at the expense of | D．at the bottom of |
Loud music like hip hop can make a driver drive far more ______, braking harder and accelerating faster.
| A．aggressively | B．deliberately |
| C．tentatively | D．definitely |
From the course of human development, the ultimate aim of the human race is to pursue the spiritual joy based on ______ materials.
| A．artificial | B．primitive |
| C．relevant | D．ample |
No matter bow much knowledge you have, if your subject is at all ______, be careful when discussing it during your speech, or you may well offend your audience.
| A．diverse | B．sensitive |
| C．abstract | D．original |