The light is still on. They ___ to turn it off when they left the room.
| A．must forget | B．could have forgotten |
| C．may forget | D．must have forgotten |
________ and short of breath, Andy and Ruby were the first to reach the top of Mount Tai.
| A．To be tried | B．Tired |
| C．Tiring | D．Being tired |
________ twice, the postman refused to deliver our letters unless we chained our dog.
| A．Being bitten | B．Bitten |
| C．Having bitten | D．To be bitten |
For breakfast he only drinks juice from fresh fruit ________ on his own farm.
| A．grown | B．being grown |
| C．to be grown | D．to grow |
Now that we’ve discussed our problem, are people happy with the decisions ________?
| A．taking | B．take |
| C．taken | D．to take |
When we visited my old family home, memory came ________ back.
| A．flooding | B．to flood |
| C．flood | D．flooded |