单项选择题

The example of El A1 Airlines shows that ______.

A．revengeful customers are a threat to the monopoly of enterprises
B．an ad campaign is a way out for enterprises in financial difficulty
C．a good slogan has great potential for improving service
D．staff retraining is essential for better service

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单项选择题

It can be inferred that the author ______.

A．is satisfied with present relationships between home and school
B．feels that traditional program in mathematics is highly superior to the developmental program
C．feels that parent-teacher interviews can be made much mere constructive than they are at presentB) is of the opinion that teachers of this generation are superior to those of the last one

单项选择题

As used in the text (Para. 6) the word petty most probably means

A．serious
B．vivid
C．concerned
D．minor