All of us found ______ difficult to work out the maths problem.
We will reach Dali in Yunnan Province, _______our cousins will join us.
--- So you missed The Lord of The Ring.--- _______. I got to the cinema twenty minutes before it finished.
--Do you want me to help you with the cleaning?--No, Lisa. I can manage, but ___.
At the railway station, the mother waved goodbye to her daughter until the train was ___.
After the long journey, the three of them went back home, ___.