Every minute about ____ babies are born in the world, so the world’s population is increasing by _____million every year.

We should practise speaking English ________ to improve our spoken English.

Our math teacher ______ in our school for 20 years and he _____ here when he was 23 years old.

We couldn’t finish our work so early _____ your help. [ ]

______ does Mary go to the Bubby Club? — Once a week. [ ]