The radiation of uranium was then regarded as_____secret of_____nature.
| A．a;the | B．a;a | C．the;the | D．a;/ |
Lucy is a very optimistic girl. ______ she is faced with difficulties, she always sees the bright side.
| A．Every time | B．Now that |
C．As soon as | D．On condition that |
All the people on the list must be told to attend the meeting; you must make sure that no one is _______.
| A．left out | B．set aside |
C．cut off | D．kept away |
The task is very difficult. I wonder whether we will be able to finish it in the ________ of any other helpers.
| A．appearance | B．escape |
C．spare | D．absence |
If you pay for the computer in cash, you could have a 5% discount; _______ we can deliver it to you for free.
| A．in demand | B．in addition |
C．in return | D．in place |
The project ______ last month but unfortunately it had to be prolonged because of the financial problem.
| A．needn’t have been finished |
| B．shouldn’t have finished |
| C．could have been finished |
| D．must have finished |