– Why you didn’t handed in your exercise paper?
–Sorry, but I ____ that it should be turned in today.
| A．didn’t know | B．hadn’t known |
| C．haven’t known | D．don’t know |
John has really got the job because he showed me the official letter _____ him it.
| A．offered | B．offering | C．to offer | D．to be offered |
Time, ______ correctly, is money in the bank.
| A．to use | B．used | C．using | D．use |
After completing and signing it, please return the form to us in the envelope _____.
| A．providing | B．provided | C．having provided | D．provide |
_______ with care, one tin will last for six weeks.
| A．Use | B．Using | C．Used | D．To use |
Film has a much shorter history, especially when such art forms as music and painting.
| A．having compared to | B．comparing to |
| C．compare to | D．compared to |