—What would you wish to do if you were a college student again?
—That's very hard to say, but I wish I when I was a college student.
| A．has not studied biology | B．did study biology |
| C．had studied biology | D．studied biology |
--- Tom, why didn’t you come to the meeting yesterday?
--- I _____, but my car broke down.
| A．would | B．had | C．was going to | D．did |
There is no doubt ______ man will conquer nature some day.
| A．whether | B．if | C．which | D．that |
______ different life today is from ____ it was 20 years ago.
| A．What a , what | B．How , what | C．What, what | D．What a , how |
Paper-making began in China and from here it ________ to North Africa and Europe.
| A．spread | B．grow | C．carried | D．developed |
In______1860s, the Italian archaeologist Giuseppe Fiorelli was made______director of the Pompeii dig.
| A．the; 不填 | B．the; the | C．不填; 不填 | D．不填; the |