The reason for his success is ______ he worked very hard.
| A．why | B．that | C．whether | D．how |
28. We have to set a definite date for the concert. The underlined word means _____.
| A．fixed | B．clear | C．sure | D．Certain |
27. This instant dictionary(快译通) is too _____. He can’t afford it, to say nothing of a portable computer (手提电脑).
| A．dearly | B．expensive | C．costly | D．High |
26. With only the fire burning, the room was _____.
| A．dark | B．dim | C．black | D．Dusky |
25. Oh, the fire is getting nearer and nearer. It is _____ our children and old people.
| A．dangerous on | B．dangerous to | C．dangerous for | D．dangerous with |
24. It is _____ that my nephew is really fond of classic music, which he has been exposed to (熏陶)for years.
| A．true | B．real | C．correct | D．Right |