______young(Young) man as he is , he has managed to have ______ knowledge of cultural differences of different countries.
| A．A; the | B．A; a | C．/; / | D．/; a |
30. This dictionary is of great use, which can help you_________many problems about words and idioms.
| A．keep up | B．clear up | C．look up | D．take up |
29. The________you sign your name can tell experts a lot about you.
| A．choice | B．method | C．means | D．way |
28. Hello, you_______5678234, I’m sorry but I am unable to answer your questions right now.
| A．reached | B．are reaching | C．have reached | D．had reached |
27. After the flood, no house in the village______ .
| A．left standing | B．was left to stand | C．was remained | D．remained standing |
26. The news that scientists so far haven’t found out the cause of bird flu discouraged some WHO officials,________?
| A．didn’t they | B．did it | C．didn’t it | D．did they |