— Joe, what about going to Belgium for our coming holiday?
— Sorry, honey, I _________ on the newly discovered dinosaur site in Argentina. There are remains of what is thought to be the largest creature ever to walk the earth.
| A．was working | B．work |
| C．will be working | D．worked |
—I’m going to have an interview this weekend. Will you please tell me how I can do well in it?
—_____, but I have to check my schedule first.
| A．Good idea | B．Take it easy |
| C．By all means | D．Don’t mention it. |
The teacher tried to explain the phenomenon to his students, but his meaning didn’t really_____.
| A．get down | B．get across |
| C．get over | D．get in |
If we forgave criminals, we might become a society of endless excuses_____ no one accepts responsibility for anything.
| A．which | B．where | C．that | D．when |
My deskmate is still a puzzle to me; at one moment he is quiet while at another he _____ be quite active.
| A．can | B．must | C．should | D．would |
My neighbour’s dog is fierce and dangerous, so I think he ought to keep it in the yard _____ it attacks any more children.
| A．until | B．since | C．when | D．before |