单项选择题

The stone chip is thought to be the most important tool because it _______.

A．was one of the first tools
B．developed human capabilities
C．led to the invention of machines
D．was crucial to the development of mankind
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单项选择题
Which of the following candidates is eligible for the election of councilors
A．A 20-year-old British who has been living in the area for a year.
B．A 30-year-old Englishman who has moved to the area half a year ago.
C．A 40-year-old British who has been working in the area for 2 years.
D．A 50-year-old Irishman who has been working and living in the area for 3 years.
单项选择题
How often are county council elections held
A．Every four years.
B．Every two years.
C．Twice a year.
D．Four times a year.
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