A lock ___ locking a door.
| A．is used to | B．used to | C．is used for | D．is used into |
Anyone can get into the club, _______ he is a member there.
| A．even if | B．so long as | C．because | D．unless |
If the building project_______ by the end of this month is delayed, the construction company will be fined.
| A．completed | B．is completed | C．to be completed | D．being completed |
My grandma noticed that the girl ________ a short-sleeved dress, so she gave the girl a new sweater.
| A．has worn | B．was wearing | C．wears | D．is wearing |
According to IQ scores, you are smartest from 18 t0 25, but you're wiser and more experienced _______ increasing age.
| A．for | B．with | C．at | D．of |
A1l flights _________ because of the heavy storm, so we decided to take the train.
| A．have canceled | B．have been canceled |
| C．had canceled | D．had been canceled |