Some students often listen to music _____ classes to refresh themselves.
| A．between | B．among | C．over | D．during |
— Did you return the book to me? Why can’t I find it anywhere?
— ________. You were writing a letter at your desk at that time.
| A．I will give it to you | B．I did give it to you |
| C．I had given it to you | D．I do give it to you |
The old worker _______ a very practical plan at the meeting yesterday, but it was turned down by the manager.
| A．put off | B．put on | C．put up | D．put forward |
— Were you caught in the heavy rain this morning?
— Yes, I was. _______ had I left home than it began to rain dogs and cats.
| A．No sooner | B．Seldom | C．Hardly | D．Never |
As citizens of our country, it is our duty and responsibility to _______ the legal rights of our own in the election.
| A．stand up for | B．stand out | C．stand by | D．stand up |
Many experts agree that once these treasures are _______ to the air, great harm will be done to them. So they think it better not to unearth the treasures.
| A．exposed | B．threatened | C．constructed | D．conserved |