216. If you feel dizzy in a coal-burning room, that’s lack of . Please open the window and air the room at once.
It was April 29, 2011_____ Prime William and Kate Middleton walked into the palace hall of the wedding ceremony.
The Nile River ____ flood large areas but now the water ____ produce electricity.
So difficult ____that no one could ___ a good solution to it.
When we arrived, she went straight to ___ kitchen and started to prepare ___ meal for us.
____they decide which college to go to, students should research the admission procedures.