The bridge was built in memory of the adventurer who was believed ______ the valley.
| A．to have been discovered | B．to discover |
| C．to have discovered | D．having been discovered |
George applied for the position three times ______ he finally got it.
| A．before | B．until | C．when | D．after |
With his eyes ______ on the family album, he thought of the fun he had when he lived with his parents.
| A．fixing | B．fixed | C．to be fixed | D．being fixed |
Postage ______, the necklace will cost you at least 650 yuan.
| A．including | B．included | C．include | D．to be included |
We all think that _____ no need to make laws to prevent the young from getting married during their college life.
| A．it is | B．there has | C．it has | D．there is |
Everyone hopes that we can do something to make things better, so we can't help ______ under the stress.
| A．but working | B．but to work | C．work | D．but work |