Wildfires are mainly caused by people, not by nature.
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A．how learnedB．how to learnC．to how learnD．how learning
A. how learned
B. how to learn
C. to how learn
D. how learning
This passage is primarily concerned with______.
A. the change of people's attitude toward their college education
B. the benefits of a college education
C. the result of formal and informal learning
D. the intercommunication among college students
A．Farm workers.B．White-collar workers.C．Blue-collar workers.D．Not mentioned.
A. Farm workers.
B. White-collar workers.
C. Blue-collar workers.
D. Not mentioned.
Rapid economic development has resulted in all the following EXCEPT______.
A. an increasing number of taxi passengers
B. the wide use of labour-saving devices
C. an increasing fast pace of life
D. people's awareness of the importance of exercise
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