Be quite, the head teacher Mr. Qian is coming. —Don’t worry. It _____ be him. Mr Qian is much fatter.

My brother is ____ years old．Today is his _____ birthday．

It was raining hard.___________ he didn’t have an umbrella.

About _______of the engineers in my company seem to be in their _________．

He is a good student,and works very hard;____.