While building a tunnel through the mountain, ______ .
| A.an underground lake was discovered |
B.there was an underground lake discovered |
C.the workers discovered an underground lake |
| D.a lake was discovered underground |
You will be successful in the interview ______ you have confidence.
| A.before | B.once | C.until | D.though |
The factory was built in a secret place, around ____ high mountains .
| A.which was | B.it was |
| C.which were | D.them were |
The question is ____ of great importance.
| A.that | B.it | C.one | D.what |
Yes,___ is difficult to find a job nowadays, but ____ is more difficult is to try to find such a job with a high salary but little work to do.
A it ; it B. what ; what
C. it ; what D what ; it
Some of the people had ____taken up their arms.
| A.truly | B.actual |
| C.in the fact | D.actually |