The past two years ______a sharp rise in oil price, which adds to the burden of auto transportation industry.
| A．has witnessed | B．witnessed | C．is witnessing | D．witnesses |
I shouldn’t have accepted the man’s present，but I found it difficult to turn down his________.
| A．offer |
| B．request |
| C．suggestion |
| D．plan |
Helen always helps her mother even though going to school ________most of her day.
| A．takes up |
| B．makes up |
| C．saves up |
| D．puts up |
I ________it as a basic principle of the company that suppliers of raw materials should be given a fair price for their products.
| A．make |
| B．look |
| C．take |
| D．think |
We were just about to call him ________his mother came back.
| A．while |
| B．as |
| C．when |
| D．because |
The spokesman never gave a________answer to any question of the reporters.They often talked some unconcerning things.
| A．straight |
| B．close |
| C．clear |
| D．direct |