After he left college, he was employed in an international company
and there ever since .
| A．worked | B．has worked | C．had worked | D．was working |
31. Internet shopping is really _____________ when people are sure of its safety and security.
| A．taking off | B．taking up | C．setting off | D．setting up |
30. What the young man can’ t ___________ is that his mum always treats him like a baby.
| A．support | B．undertake | C．hold | D．bear |
29.____________ the news, so far, has been good, there may be bad days ahead.
| A．When | B．While | C．If | D．As |
28. Not until the train pulled into the next station ______________ her suitcase gone.
| A．Mary had found | B．had Mary found |
| C．did Mary find | D．Mary found |
27. Since 1994, the glacier in Antarctica has lowered by as much as 90cm, ______________sea level to rise.
| A．having caused | B．causing | C．caused | D．being caused |