配置路由器端口，应该在哪种提示符下进行？——
A. R1(config—if)#
B. R1(config—in)撑
C. Rl(config)#
D. R1(config—intf)}}
What is Mary doing at the beginning of the talk？
A. Going home.
B. Taking a walk.
C. Waiting for a bus.
How high is the Great Pyramid？
A. 137 meters.
B. 173 meters.
C. 230 meters.
When the child uses "beautiful" to respond to the mother, it shows that ______.
A. the child loves certain words better than others
B. the word "beautiful" is used more by children
C. reading aloud by parents has improved the child's language
D. the child has the ability to correct parents
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