He convinced me __________the difficulty of the work.
| A．on | B．at | C． for | D．of |
--- Playing table tennis.
| A．killing time | B．to kill time |
| C．spending the time | D．to spend the time |
--- Yes. It is in the reading material ____ we ____ reading yesterday.
| A．that; did | B．that; were | C．when; were | D．when; did |
| A．is improving; taking | B．has been improved; being taken |
| C．improved; taken | D．is improving; have taken |
| A．it | B．one | C．this | D．that |
| A．wouldn’t | B．couldn’t | C．mustn’t | D．needn’t |