Mr. Joe, ________ professor at the University of Fribourg, is famous for his academic achievements in ________ World History.
| A．the; / | B．the; a |
| C．a; the | D．a; / |
Jack took part in the speech contest and, ______ is more surprising, won the first place.
| A．that | B．what | C．which | D．it |
Living off home is a sure way to improve your self-care ability, and this is especially true ______ it comes to studying abroad.
| A．before | B．since | C．when | D．unless |
You should feel content, as the design can’t be done any ______.
| A．best | B．worst | C．better | D．worse |
_____ to nuclear radiation, even for a short time, may produce variants (变异体) of genes in bodies.
| A．Being exposed |
| B．Having exposed |
| C．Exposed |
| D．After being exposed |
Often, when he something that him, he wasted his time dozing.
| A．should be doing, gave |
| B．should have been doing, was given |
| C．should do, was given |
| D．should have been doing, had given |