---I’m sorry, but there is no smoking on this flight.
---Oh, I _____that. Sorry, I won’t again.
| A．don’t know | B．didn’t know | C．won’t know | D．haven’t known |
_____we fail , we _____trying.
| A．Even if , don’t stop | B．Even though, won’t stop |
| C．Even, will not stop | D．Even although, shall never stop |
_____it was late , she went on working.
| A．Though | B．Because | C．Since | D．Whether |
He started early so that he_____there in time.
| A．could get | B．got | C．had got | D．would have got |
_____clearly so that your teacher_____you correctly.
| A．Write, can understand | B．Having written, can understand |
| C．To write, could understand | D．Writing, will understand |
Let the dog loose so that it_____have a run.
| A．should | B．must | C．could | D．need |