填空题

S1

【参考答案】

was→were
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单项选择题
A．It is a self-sufficient community.B．It offers cheap land to people.C．It tends to concentrate on a single product.D．It lies within a space station orbiting Earth.
A．It is a self-sufficient community.
B．It offers cheap land to people.
C．It tends to concentrate on a single product.
D．It lies within a space station orbiting Earth.
单项选择题
A．1,000 dollars.B．1,600 dollars.C．2,000 dollars.D．2,200 dollars.
A．1,000 dollars.
B．1,600 dollars.
C．2,000 dollars.
D．2,200 dollars.
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