这四句loose sentence如何改写成periodic sentense?

问题描述:

这四句loose sentence如何改写成periodic sentense?
1.She missed the step and sprained he ankle.
2.The Wangs must have gone away for the summer holidays,for we have not seen them for two or three weeks.
3.There were the translators in their booths,and the girl secretaries at the doors,and the reporters grumbling and scribbling in their seats.
4.Our friends,who had started before us,promised that they would meet us,but when we arrived at the bus stop,they were nowhere to be seen.

1.She sprained her ankle because she missed the step .
2.we have not seen the Wangs for two or three weeks.They must have gone away for the summer holidays.
3.when the girl secretaries at the doors,and the reporters grumbling and scribbling in their seats,the translators are in their booths.
4.when we arrived at the bus stop,Our friends,who had started before us,promised that they would meet us,were nowhere to be seen.