Principal White has been working in the school for about 20 years, all his energy to teaching and researching as well as the running of a healthy school

er I think of my childhood, I’llalways feel that the period of free time seem to have passed ________

The business of the company was growing so fast that the manager had to _____ more workers

I often have the case ______ I can’t recognize my friends’ voice on the phone[ ]

Everyone in the village is very friendly It doesn’tmatter ___ you have lived there for a short or a long time