I send you books today, the rest ________ in a few days. 

With two children _____ middle school, the parents are working hard.

With a huge amount of food ________，all of the staff are busy preparing for the dinner tonight.

______ our food running out, we had to walk to a village for help. 

To Daniel’s parents’ surprise, the living room was clean and tidy, with the window ______and fresh air ______in.