—Sir， can I pass the examinations this time？
—That depends on you work hard enough or not.
what B. that C. whether D. how
He was about to leave ___ Tom arrived so he stayed a little longer.
| A．when |
| B．while |
| C．as |
| D．before |
Each statue is of a person who has made a ___ in American history.
| A．difference |
| B．improvement |
| C．significance |
| D．importance |
The official ___ whom we applied ___ a permit was most warm-hearted.
| A．for; for |
| B．to; for |
| C．in; to |
| D．to; with |
Many of the survivors are being ___ burns and other injuries at local hospitals.
| A．treated for |
| B．cured for |
| C．treated as |
| D．cured of |
The number of people who ___ in position of professional skills and knowledge ___ shrinking.
| A．are; is |
| B．is; are |
| C．are; are |
| D．is; is |