14.Teachers _____ their knowledge to their students .
| A．pass by | B．pass to | C．pass over | D．pass on |
The music brought the days back to me _____ I was out of work wandering hopelessly on the streets.
| A．until | B．that | C．when | D．which |
Jack is the right person you can rely on to ____ the research when you are on vacation for the next two weeks.
| A．carry on | B．focus on |
| C．take up | D．insist on |
He failed the final examination and only then ____ how much time he had wasted.
| A．he realized | B．had he realized |
| C．he had realized | D．did he realize |
Recently, however, scientists have been finding that long-term use of these fertilizers can cause damage to the land, thus _____it less fertile.
| A．make | B．to make |
| C．made | D．making |
When the area was _______ by the flood, the government organized people to send food and medicine there immediately.
| A．cut away | B．cut down |
| C．cut off | D．cut up |