Keys _______ opening the lock in the door.
| A．used for | B．are used | C．are used to | D．are used for |
The flowers over there _________ by the students last year.
| A．plant | B．planted |
| C．are planted | D．were planted |
——Must I stay at home and take care of him?
——No, you ___________. He can take good care of himself.
| A．mustn’t | B．won’t |
| C．can’t | D．needn’t |
The desk is ________ heavy ________ carry.
| A．so, that | B．too, to |
| C．to, too | D．very, that |
I’ll go to visit you ________ next week.
| A．sometimes | B．some times |
| C．sometime | D．some time |
They suddenly returned ________ a rainy day.
| A．at | B．on | C．in | D．during |