Often the rich topsoil is (27)________ away by the hot, dry winds .Streams

Chọn từ có trọng âm khác

What is the topic of the passage?

: I was doing my homework. My computer crashed.

In 1686, Isaac Newton (publish) the Mathematical Principles of Natural Philosophy where he (lay) the foundations for universal gravitation and described the motion of the Sun and the planets.

Natural gas is cheaper and less polluting than coal.

=> Coal is…………………………………….