• A. by the quake itself
• B. not be prevented
• C. to cause damage of property and loss of lives
• D. of a possible earthquake
• E. the unusual behaviors of some animals
• F. the strong behaviors of human beings

Scientists have been working hard to warn people ______.

A．Teachers are more anxious teaching math than their students learning math.
B．Math teachers, like math learners, do not like the subject due to its difficulty.
C．A difficult subject like math may affect teachers’ confidence in teaching the subject.
D．Math is so difficult that no teachers like to teach it.

A．sweet
B．sound
C．bad
D．enough