The number of people invited__________fifty, but a number of them__________ absent for different reasons.

Scientists say it may be five or six years ______ it is possible to test this medicine on human patients

Where is your father—- He _____ Australia and he _____ Sydney for two weeks.

The water and soil conservation project resulted infarmers ______ the crops on the farmland _____ trees and grass.

You should be punished if you to your teacher.