The old rules have to be ______ because they only applied to the circumstances that existed when they were made a hundred years ago.
| A．developed | B．established | C．observed | D．revised |
He is beginning _____ his mistakes.
| A．correct | B．to correct | C．correcting | D．corrected |
The machine requires _____, so the workers are required _____ ready.
| A．repair；to get | B．repairing；to get |
| C．repairing；getting | D．to be repaired；getting |
_____, he left the room.
| A．Finishing the work | B．Had finished the work |
| C．After finished the work | D．Having finished the work |
Jessie was sick _____ such noise.
| A．of hearing | B．to hear | C．of being heard | D．heard |
. _____ more time, he could have done the work much better.
| A．To be given | B．To give | C．Given | D．Giving |