________its low cost, the appeal of iron as a building material lies in its strength, its resistance to fire, and its potential to span long distances.
| A．Other than | B．Apart from | C．Except for | D．Rather than |
Michael Jordan, known as ____ top scorer in _____ NBA, did much charity work for society.
| A．a; a | B．the; the | C．A; / | D．/; the |
---I hear Johnson was badly injured in the accident. ---_____, let's go and see him.
| A．If so | B．Whenever possible | C．If any | D．What's more |
Some researchers believe that there is no doubt ____ a cure for AIDS will be found.
| A．which | B．that | C．what | D．whether |
Don't panic; just ______ the rock and I'll come and fetch you down.
| A．keep up with | B．put up with | C．make up for | D．hold on to |
With a lot of difficult problems ____, the newly -elected president is having a hard time.
| A．settled | B．settling | C．to settle | D．being settled |