—It seems that you know Dr. John very well.
—Of course, we ________ together for five years in the 1990s.
| A．have worked | B．had worked |
| C．are working | D．worked |
With the help of the firefighters, the people caught in the fire managed to escape to the safe place, ______.
| A．hungrily and frightened | B．hungry and frightened |
| C．hungrily and frightening | D．hungry and frightening |
---- How long was it ______ you finally reached your goal of becoming a doctor?
---- Five years.
| A．before | B．since | C．when | D．until |
Cold ______ the night air was, he slept soundly because he was so tired after working for a whole day.
| A．although | B．while | C．however | D．as |
The price of the goods in this shop is too high. I can buy only half the goods I bought in that shop and I’m paying ________.
| A．as three times much | B．as much three times |
| C．much as three times | D．three times as much |
The money he has contributed in the past years to ______ the disabled is now considered to be of great value.
| A．help | B．helping, | C．having helped | D．being helped |