After he left college , he was employed in an international company and __
___ there ever since .
| A．worked | B．has worked | C．had worked | D．was working |
An advertisement is useful in_____ it can persuade customers to buy the kinds of goods in the shop.
| A．that | B．which | C．what | D．whether |
—Why didn’t you apologize to her?
—She drove away ______ I could say a word.
| A．before | B．after | C．until | D．unless |
____ private cars are bringing us convenience, they may also cause more traffic accidents and pollution.
| A．While | B．As | C．If | D．Since |
Luo Jing,_____ broadcasting style lots of Chinese appreciate, died as a result of cancer.
| A．whom | B．of whom | C．whose | D．his |
Mary is such a lovely girl_____ many of her classmates are willing to help whenever necessary.
| A．that | B．what | C．whom | D．as |