Do you know that Yuan Longping is known as ______father of hybrid rice

Perhaps we need toclear away these books to make ______ for our new students

The tennis is a popular game. people like playing it in the world.

When the headmaster spoke out his plan, the _____of the students in the class ____ against it.

I suppose we’ll have to, bad weather conditions, spend more than 500 days undertaking the construction.