_____ is even more important is that as the earth cooled down, water began to appear on its surface.
| A．As | B．That | C．What | D．Where |
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 |
______the urgent problem caused by wars and conflicts, the UN helps countries with other problems.
| A．Except | B．Apart from |
| C．Apart for | D．Except for |
It’s common that the freshmen cannot ______ the new environment in the first period of their life in the university.
| A．adjust to | B．used to |
| C．accustomed to | D．be adjust to |
Chaplin was ____ us all, as he had developed a new manner of acting.
| A．known as | B．known to |
| C．known for | D．known on |
By the time I rushed to the train station, the last train_________.
| A．has left | B．was being left |
| C．is leaving | D．had left |