_____ is a good form of exercise for both young and old.

—What’s the central idea of the passage，Bob?—Sorry，I can’t make________of it.It’s beyond my ability.

Nowadays senior high students are burdened with too many        ，which is making them less and less confident.

The plan was that the two parties should first reach an agreement on the basic ________,the details to be worked but later.

 This event not only raised _______ of world hunger, but also raised lots of money to help starving children.