Madame Curie(居里夫人) contributed all his life ______ radium(镭) so that she has earned respect from people all over the world.
| A．to study | B．to studying |
| C．study | D．studied |
13. The club women gathered ______ clothes for people in the tsunami-hit countries.
| A．a great deal of | B．masses of | C．a large amount of | D．amounts of |
12. We can’t continue to pretend that the problem of homelessness doesn’t ______ in this city.
| A．exist | B．live | C．be | D．Survive |
11. The pilot, whether ______ or design, made the plane do a sharp turn.
| A．by accident | B．at times | C．suddenly | D．all at once |
10. Then you usually lie there just ____ the ceiling, thinking about everything that could go wrong.
| A．glancing at | B．watching at | C．glaring at | D．staring at |
9. _____frightened us ____the electricity was suddenly cut off, which threw all of us into the dark.
| A． It was; that | B．What was; most was that |
| C． It ; most what | D． What; most was that |