The programs of UNICEF have saved thousands of African children who would      have died from hunger or disease.

The charity sale our school organizes every year has taught us much that we would never have________ learned in class.

It is difficult for children to change their eating habit later in life. _____，parents should encourage healthy eating from an early age.

They have held three meetings this week _________.

-- ______________, I can make it home by 8:30 when the football game will be on TV. -- Well, it depends on how efficiently you work.