So far nobody has claimed the money in the library.
| A．discovered | B．to be discovered |
| C．discovering | D．having discovered |
The UN system is a major purchaser of goods and services ,_______over $4 billion a year .
| A．to total | B．totaling | C．totaled | D．total |
I can’t tell you the exact time when I will get there ._______,I’ll be there as early as I can .
| A．No matter | B．Anyhow | C．Therefore | D．Besides |
We should not judge a person by his _______and the clothes he wears .
| A．stage | B．quality | C．pace | D．appearance |
As we sped down the highway ,the lights of the city ________before us .
| A．explored | B．solved | C．arose | D．charged |
Hiking by oneself can be fun and good for health .It may also be good for _______building .
| A．respect | B．character | C．reputation | D．friendship |