________ for a whole night, we still couldn't agree on when to start and where to go for the holiday.
| A．Discussed | B．Having discussed |
| C．Discussing | D．Being discussed |
---- I’m sorry. That wasn’t of much help.
---- Oh, ______. As a matter of fact, it was most helpful.
| A．sure it was | B．it doesn’t matter | C．of course not | D．thanks anyway |
_____ computers are convenient to us in daily life, it may also cause other problems.
| A．Whether | B．Because | C．As | D．While |
Mistakes 
don’t just happen; they occur for a reason. Find out the reason, and then making the mistake becomes_______.
| A．favourable | B．precious | C．fundamental | D．worthwhile |
The plan just because people were unwilling to cooperate.
| A．broke down | B．pulled down | C．turned down | D．put down |
With the decision ______, the members present at the meeting were dismissed(解散).
| A．to make | B．to be made | C．made | D．having made |