单项选择题

The sale usually takes place outside the house, with the audience________ on benches, chairs and boxes
A、 having seated
B、seating
C、seated
D、having been seated

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单项选择题

Where does the story take place?

A．Britain
B．Austria
C．Germany
D．Sweden

不定项选择

性选择发生在不同性别的个体之间。

A．正确
B．错误