6. As there is less and less coal and oil, scientists are exploring new ways of making use of energy, such as sunlight, wind and water for power and fuel.
Studying Wendy's menu, I found that many of the items are similar toof McDonald's.
I made a promise to myself______ this year, my first year in high school, would be different.
No matter how bright a talker you are, there are times when it's bettersilent.
The development of industry has been_______ gradual process throughout _______ human existence, from stone tools to modern technology.
— Is there anything else to discuss? —_____________. I guess.