单项选择题

Which of the following titles best reflects the main focus of the passage

A．A Survey of Three Mexican American Families at Work in Texas.
B．Innovative Career Women: Effects on Family Unity.
C．Changes in the Life Styles of Migrant Mexican American Families.
D．Farming of Family: The Unavoidable Choice for Migrant Farm Workers.
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单项选择题
On the island of Zakinthos, measures to protect the turtles meet resistance chiefly for ______.
A．political reasons
B．economic reasons
C．environmental reasons
D．developmental reasons
单项选择题
Overcrowding in cities, towns and villages is another problem caused by over-development of tourism, an outcome of which is ______.
A．that strangers park their cars where they can
B．that local traders and residents cannot get around to do their work
C．that the sheer weights of incomers can be a hazard
D．traffic jams
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