The roof fell ________ he had time to dash into the house to save his baby.
| A．as | B．after | C．until | D．before |
Janet was angry at _____.
| A．my not waiting for her | B．I didn't wait for her |
| C．me not wait for her | D．me to not wait for her |
During the next ten years, she had to work hard _____ for the necklace.
| A．paying | B．to pay | C．for paying | D．in order to paying |
-Would you like to sing a song for us?
-_____.
| A．I prefer not | B．I prefer not to | C．I prefer to not | D．I wouldn't prefer |
It is _____ thinking about it now.
| A．of no use | B．not use | C．no use | D．not of any uses |
You'd better not have the lights _____ all day long.
| A．burning | B．burned | C．to burn | D．being burnt |