—Do you think we can get there on time?
—Yes，_______ the truck doesn’t break down.
| A．even if | B．unless | C．until | D．so long as |
______ 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 |
You just can’t imagine what a bad impression some Chinese left _____foreigners while travelling abroad, so it is necessary to impress _____ people the importance of good manners.
A. on, to B. on, on C. to, on. D, to , to
______ is even more important is ______ as the earth cooled down, water began to appear on its surface.
A. What, that B. That, what C, That, that D. What, what