Which of the following statements is not mentioned in the passage（）
A. It is generally believed that the year 1500 can be set as the beginning of the modern English language
B. Some other languages had great influence on the English language at some stages of its development
C. The English language has been and still in a state of relatively constant change
D. Many classes or groups have contributed to the development of the English language
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A heat pump is used to make the room comfortable by using_____（）
A. electric resistance
B. natural heat and cool
C. coal energy
D. petrol energy
Choose the appropriate meaning for the word “inflection” used in line 4 of paragraph 2（）
A. Changes in the forms of words
B. Changes in sentence structures
Changes in spelling rules
D. Words that have similar meanings
According to the passage, we can make the substance cool quickly by _____（）
A. blowing cold air over it
B. putting it in the room
C. covering it with something
D. blowing hot air over it
According to the passage, a heat pump is _____（）
A. only used at night
B. only used in summer
C. only used in winter
D. used in summer and in winter as well
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