All of them try to use the power of the workstation ___ information in a more effective way.
| A．presenting |
| B．presented |
| C．being presented |
| D．to present |
I want to be left alone ___ things out.
| A．think | B．thought | C．thinking | D．to think |
Before __ the trunk must be checked.
| A．used | B．to use | C．being used | D．to be used |
The young Swede was made ___ a lot of practice before the Napoleon’s inspection.
| A．have | B．had | C．having | D．to have |
Everybody knows that we should not drink ___ water, or they will get burnt.
| A．boil | B．boiled | C．boiling | D．being boiled |
William Tell hesitated to let his boy risk __ there with an apple on his head.
| A．standing | B．stood | C．to stand | D．to be standing |