The human body is a living machine, and, like all machines, it needs “fuel” to supply it with energy. This is provided by the food we eat. But how much do we need to stay healthy?
The energy value of food is usually measured in calories(卡). A calorie is the amount of heat required to raise the temperature of 1 kg of water by 1℃. The number of calories people need per day is different, as the picture shows. Also, the number of calories you use at any one moment normally depends on the activity you are in. For example, you need more calories for standing than for sitting, more for running than for walking, and so on.
The energy in food is in the form of three kinds of chemical materials—carbohydrate（碳水化合物）, protein（蛋白质） and fat. Carbohydrate provides 3.8 Cal /gm of the energy, protein 4.0 Cal/gm, and fat 8.8 Cal/gm. Each food contains different amounts of these materials, as the round pictures show.
(P= protein      C= carbohydrate    F=fat)
【小题1】How many calories are needed to raise the temperature of 5kg of water from 35℃ to 90℃?

Mike didn’t do his English homework. The teacher asked him    31  . “I’m sorry, I   32  .” “But why did you forget?” “It didn’t seem   33   or important,” said Mike. “Are you going to punish (惩罚)me?” asked Mike. “   34  . The punishment is for me. I didn’t teach you well,” said the teacher.

“Thank you,” said Mike. “You are the best    35  in the world. I can never know as much as you , but you taught me a lot.” “How can I be a good teacher if the students do not know more than me? I will not succeed until that happens,”   36  the teacher.

Mike’s   37   teacher was a strict（严厉的） man.. Every day Mike played the same piece of music,and the teacher said it was not good and he must practise   38  . After two years of hard work, Mike left and felt sad.   39  when he played it in public, everyone said it was perfect, and he found he could play other pieces of music easily.   

What do you think of these two   40  ?