Since production has risen ________, the personal income has increased year by year.

. ______we’ll be able to drive a car______ by electricity, solar energy in about ten years.

 If a person has not had enough sleep, his actions will give him ___ during the day.

Having gone through several rounds of selection, the young man ______ gained a chance to perform in China Talent.

 History is the best teacher. It ______records the development path of each country and foretells the future to us.