. She ought to stop work; she has aheadache because she ____ all day long.

All the teachers should try to make students know the______ of the study. Then they’ll study hard.

81Male and female students are quite different from each other ______ the age at which they begin to develop an intellectual self-discipline

Do you have any idea why Jenny left the firm—Probably , she _____ for a pay rise, but was turned down.

Look! They _______________ a picnic.