The chair looks rather hard, but in fact it is very comfortable ____.
| A．sitting on | B．to sit on | C．sitting | D．to sit |
______her ambition of becoming a professional singer, she has been training very hard since an early age.
| A．Realizing | B．To realize | C．Having realized | D．To have realized |
According to Darwin's Survival of the Fittest, only those species that were able to ______ the sudden great changes of their living conditions survived.
| A．appeal to | B．relate to | C．adapt to | D．contribute to |
The poet ______described the peaceful Rocky Mountain and the beautiful Mississippi River in his newly-published poetry.
| A．aggressively | B．vividly | C．desperately | D．controversially |
______the weather, our school sports meet has to be held in the indoor stadium.
| A．In view of | B．In charge of | C．In place of | D．In search of |
How can you expect to get ahead in your life ______ you even live to yourself from time to time?
| A．though | B．until | C．before | D．when |