[填空题]What is one of the causes of having a low energy level One of the causes is ______.

[简答题]If your energy cycle is low in the morning but you have an important job early in the day, rise before your usual hour, and then you will work better at your low point.

[单项选择]Compared to alternative energy, one of the disadvantages of fossil fuels is ______.
A. Mining is difficult.
B. It costs a lot of money to preserve.
C. They are difficult to be processed.
D. They are non-renewable.

[简答题]1. Energy is one of the biggest problems most concerned by people.
2. One of the solution to the problem is severe conservation of natural resources.
3. The best way to solve the problem is to develop new sources of energy.

[单项选择]One ought ______ for what one hasn’t done.
A. not to be punished
B. to not be punished
C. to not punished
D. not be punished

[填空题]The secret of happiness is not in doing what one likes, ______ (而是喜欢他应做的).

[单项选择]

According to the man, what one needs to do in order to enjoy beautiful things
A. One has to be a millionaire.
B. One has to be keen on things around him.
C. One has to go to Paris.
D. One has to go to Vienna.

[简答题]Energy crisis is one of the main problems facing the world today. 2. Importance of energy 3. Conserving energy {{B}}Energy Crisis{{/B}}

[单项选择]

Energy will be one of the defining issues of this century. One thing is clear: the era of (1) Oil is over. What we all do next will determine how well we meet the energy needs of the entire world in this century and (2) .
Demand is soaring like (3) before. As populations grow and economies (4) , millions in the developing world are enjoying the benefits of a lifestyle that (5) increasing amounts of energy. In fact, some say that in 20 years the world will (6) 40% more oil than it does today. At the same time, many of the world’s oil and gas fields are (7) . And new energy discoveries are mainly occurring in places where resources are difficult to (8) , physically, economically and even politically. When growing demand meets (9) supplies, the result is more (10) for the same resources.
We can wait until a crisis forces us to do something. (11) we can (12) to working together,
A. ampler
B. surplus
C. emergent
D. tighter