Either you or one of your students ______ to attend the meeting that is due tomorrow.

For the first time, pay attention _________quickly to get the main ideas.

We learned to dive, ________ meals outside and sleepin a tent.

Experts believe ______ people can waste less food by shopping only when it is necessary.

Sandy goes to the Reading Club _____ every Wednesday afternoon and goes to the Computer Club _____ Fridays.