_____ you have made a promise, you should carry it out.[ ]

Will you be this afternoon, John?— I am afraid not. I have an appointment with my dentist.

This species has nearly _____ because its habitat has been destroyed by humans. [ ]

have the most supportive parents and teachers, ________willmake a difference to our study, unless all of us make every effort

The research on the new flu virus vaccine ischallenging and demanding Who do you think can do the job —_______ my students have a try