I don't doubt ______ he has the ability to deal with the situation, but ______ the problem can be solved quickly depends on his attitude.
| A．whether; if | B．that; whether |
| C．if; whether | D．whether; that |
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 |
All over the world the mobile phone has become _____ people would now call a necessity.
| A．which | B．that | C．what | D．when |
Either the driver killed in the car or the lucky passenger questioned by the police ______ them very puzzled how this accident has happened.
| A．make | B．makes | C．was making | D．were making |