How long may I these books

Today’s ceremony ____ 60 years’ development ofEducation in this key high school.

_____ no need to worry about the problemThe government has promised tohave clean water _____ to us from door to door

This little boy lost his way. So he needed .

Look, Mary has a new bike. How nice it is !—Yes. Her parents bought _____ for her progress in this exam. My parents also bought _____ for me for my improvement in English.