He was about to tell me the secret _______ someone patted him on the shoulder.
| A．as | B．when | C．while | D．then |
The factory used 65 percent of the raw materials, the rest of which ________ saved for other purposes.
| A．is | B．are | C．was | D．were |
---How could you _______ my sister so easily in the crowd ?
---Because she stood out in a red dress.
| A．pick out | B．pick up | C．take up | D．take out |
Not until the motorbike looked almost new ______repairing and cleaning it.
| A．he stopped | B．did he stop | C．stopped he | D．he did stop |
_________ the task , they have to stay there for another two weeks.
| A．Not completing | B．Not completed |
| C．Not having completed | D．Having not completed |
Visitors were struck by the natural _________ here, which was beautiful beyond description.
| A．resource | B．scenery | C．disaster | D．element |