My friend has returned from the UK. She ______ at Oxford for four years, during which we communicated with each other on the Internet.
| A．studied | B．has studied | C．had studied | D．has been studying |
Mr. Black was so____ to his research that he seldom cared about what happened around him.
| A．devoted | B．concerned | C．absorbed | D．used |
With more forests destroyed, a huge amount of good earth ____ each year.
| A．is washing away | B．is being washed away |
| C．has been washing away | D．were being washed away |
Men and adults under 30 are more __________ to have digital music players.
| A．probable | B．possible | C．likely | D．possibly |
---- My pan has disappeared from the table.
---- You _____ it in the wrong place.
| A．might put | B．should have put | C．need put | D．may have put |
Twenty men fell into the water and were _____ by other boats. As a result, they missed the fighting on the beach.
| A．picked out | B．picked over | C．picked up | D．picked on |