单项选择题

What does the text mainly discuss on Canada

A．The position, population and history of Canada.
B．The position, population and industry of Canada.
C．The position, population and different national races of Canada.
D．The position, history and different national races of Canada.

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单项选择题

A dam is usually built ______.

A．to cover the houses and fields
B．for people to have the right amount of water at all times
C．to help crops grow better
D．to form a large lake

单项选择题

The main purpose of announcing the above events is to give information about ______.

A．visiting teams
B．famous players
C．things to do for the weekend
D．prices to pay for the sports events