Only an hour ago ________ out why he was absent.
| A．did the teacher found | B．the teacher found |
| C．did the teacher find | D．had the teacher found |
Claire had her luggage __________ an hour before her plane left.
| A．check |
| B．checking |
| C．to check |
| D．checked |
His father got very __________ when he made a mistake again.
| A．annoying |
| B．being annoyed |
| C．be annoying |
| D．annoyed |
The young teacher says this is __________ for the beginners.
| A．difficult too a book |
| B．too a difficult book |
| C．too difficult book |
| D．too difficult a book |
In the __________ of proof, the police could not take action against the man.
| A．lack |
| B．shortage |
| C．absence |
| D．failure |
—All the lights have gone out in the office building.
—Yes, they have __________ electricity.
| A．cut off |
| B．cut up |
| C．cut in |
| D．cut down |