_______________ became the fuel of choice over charcoal and coal ...

[PhilipSeeMore]

_______________ became the fuel of choice over charcoal and coal as a cleaner burning fuel that produced
  high temperatures and did not require the use of wood.

 
  Fill in the blank(s) with the appropriate word(s).

Question 2

Before about 1,000 CE, the term _______________ referred to natural deposits of coal that were washed up
  along the shoreline in England.

 
  Fill in the blank(s) with the appropriate word(s).

[miss_1456@hotmail.com]

Answer to Question 1

Coke

Answer to Question 2

sea coal

[PhilipSeeMore]

Wow, this really help

[xiaomengxian]

Excellent