He ran the 100 meters in 9.91 seconds, and I have not seen _________ this year.
| A．the best | B．better | C．the most | D．more |
He want s to changes in the company and I am sure he will___________
| A．on time | B．at a time | C．at one time | D．in time |
. ------ The door was open.
----- It ___________open. I had locked it myself and the key was in my pocket.
| A．can’t be | B．mustn’t be | C．can’t have been | D．mustn’t have been |
The reason for his success is ___________he worked very hard.
| A．why | B．that | C．whether | D．because |
--------- ___________did they visit the moon last month?
---------They visited it in a spaceship
| A．When | B．Where | C．What | D．How |
He was about to tell me the secret___________someone called him by his name.
| A．as | B．until | C．while | D．when |