.As is known to all,____ tiger is in____ danger of dying out.
| A．a; a | B．the; / | C．a; / | D．the; the |
If he takes on this work, he will have no choice but ________ an even greater challenge.
| A．meets | B．meeting |
| C．meet | D．to meet |
Shortly after suffering from a massive earthquake and ________ to ruins, the city took on a new look.
| A．reducing | B．reduced |
| C．being reduced | D．having reduced |
The ability ________ an idea is as important as the idea itself.
| A．expressing | B．expressed |
| C．to express | D．to be expressed |
Volunteering gives you a chance ________ lives, including your own.
| A．change | B．changing |
| C．changed | D．to change |
Tom asked the candy makers if they could make the chocolate easier ______ into small pieces.
| A．break | B．breaking |
| C．broken | D．to break |