Choose the best topic sentence from the four options below. Write the corresponding letter of your choice on the Answer Sheet.

Choose the best topic sentence from the four options below. Write the corresponding letter of your choice on the Answer Sheet.

A.Petroleum a liquid fossil fuel, comes from decayed plants and animals.

B.Fossil fuels come from the earth and are among the most common types of energy used by man.

C.Coal comes from trees that died millions of years ago, decayed, and then hardened into black rock.

D.Natural gas is formed like petroleum, but the decayed plants and animals have been changed into different kinds of gases.

正确答案是B