单项选择题

A．He has learned a lot from his own mistakes.
B．He is quite experienced in training wild dogs.
C．He finds reward more effective than punishment.
D．He thinks it vital to master basic training skills.
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单项选择题
A．Changes in Lire style have a strong influence on business.B．Baby goods make money easily.C．Business men are only interested in babies.D．Business should always be ready to meet the babies’needs.
A．Changes in Lire style have a strong influence on business.
B．Baby goods make money easily.
C．Business men are only interested in babies.
D．Business should always be ready to meet the babies’needs.
单项选择题
Which of the following statements is TRUE according to the passage
A．Kids are in fewer dangers than grown-ups in Mexico City.
B．The author is a native Mexican.
C．The author’s husband is a pediatrician.
D．The Mexican history and culture appeal to the author.
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