单项选择题

A．More strict training of women drivers.
B．Restrictions on cell phone use while driving.
C．Improved traffic conditions in cities.
D．New regulations to ensure children’’s safety.
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单项选择题
The United States is the world’’s No. 1 emitter of greenhouse gases.
A．Y
B．N
C．NG
单项选择题
By saying ... those raw materials exist already in abundance in every nation the author is referring to.
A．people, the environment and culture
B．the capital used to build the tourism industry
C．the environmental resources to build up tourism
D．hosts and staff to welcome visitors
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