______ he has made up his mind, no one can make him change it.
| A．Once | B．Unless | C．Until | D．As |
They failed several times, and they finally __________ the hope of finding an effective way of solving the problem.
| A．abandoned | B．released | C．discouraged | D．resigned |
Eliza remembers everything exactly as if it __________ yesterday.
| A．was happening | B．happens |
| C．has happened | D．happened |
All the teachers are against the idea to __________ the new teaching building beside the sports ground.
| A．find | B．set | C．locate | D．build up |
I am so busy that I have __________ unanswered letters.
| A．many a | B．a large amount of |
| C．masses of | D．a great deal of |
Tina has been working so hard at English that she __________ the English exam.
| A．is Bound to passing | B．is bound to pass |
| C．will be bound to pass | D．will be bound to passing |