While building a tunnel through the mountain, ________ .
| A．an underground lake was discovered |
| B．there was an underground lake discovered |
| C．a lake was discovered underground |
| D．the workers discovered an underground lake |
-------John and I will celebrate our fortieth wedding anniversary next month. 
--------Oh, _________!
| A．cheer up | B．well done | C．go ahead | D．congratulations |
I'm amazed to hear from my school teacher again. _______，it is ten years since we met last.
| A．In a word | B．What’s more |
C．That’s to say | D．Believe it or not |
But for their help，we ______ the program in time.
| A．can not finish | B．will not finish |
C．had not finished | D．could not have finished |
We tried to find a table for seven，hut they were all .
| A．given away | B．kept away |
C．taken up | D．used up |
______ a certain doubt among the people as to the practical value of the project.
| A．It has | B．They have |
C．It remains | D．There remains |