单项选择题

Why do teachers need to be trained

A．They are afraid of losing authority.
B．They need to improve the status.
C．They need to create new learning situations.
D．They need to learn more skills.

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单项选择题

What are the characters of newly written textbooks

A．Demonstration and practice.
B．Remembering and understanding.
C．Practice and application.
D．Demonstration and remembering.

单项选择题

When Estee sold her first skin care creams, her age probably was ______.

A．13
B．18
C．20
D．23