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
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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
单项选择题
If you take part in the first competitive part of the tour, you will ride for ______.
A．35 kilometers
B．55 kilometers
C．75 kilometers
D．110 kilometers
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