（ ）–Listen! Our music teacher is playing the music of Two Butterflies.–__________!

Skimming is one of the major types of selective reading. It differs from normal reading,_________ not all of the material is read.

The output of our factory is now twice ______________ it was three years ago.

As is known to all, ______ People’s Republic of China is ______ biggest developing country in the world.

— So what is the procedure? — All the applicants ________ before a final decision is made by the authority.

We are masters of our own ____________.

Nearly________ of the surface of our planet is covered by water.

All ______ is a continuous supply of the basic necessities of life.( )

The grain output of our country has _____ that before 1949.

The number of the cars in our neighborhood is about eight ______, and ______ of them are new cars.

I think _____ knowledge of the Internet is _____ must in our work today.

Companies usually ________ a number of experiments before a new product is launched.