_____ according to the instructions, the robot can behave like a human being with average IQ.
| A．When to operate | B．When operating |
| C．When to be operated | D．When operated |
Now than we’ve discussed out problem, are people happy with the decisions ?
| A．taking | B．were taken | C．being taken | D．taken |
twice, the postman refused to deliver our letters unless we chained our dog.
A．Bein g bitten |
B．Bitten | C．Having bitten | D．To be bitten |
by a greater demand of vegetables, farmers have built more green houses.
| A．Driven | B．Being driven | C．To drive | D．Having driven |
It remains whether Jim’ll be fit enough to play in the finals.
| A．seen | B．to be seen | C．seeing | D．to see |
To test eggs, them in a bowel of water; if they float they’re bad, if they sink they are good.
| A．put | B．putting | C．to put | D．to be putting |