单项选择题

The main purpose of this passage is to __________.

A．explain how the performance of a job can be measured in points
B．describe the responsibilities of various departments
C．tell readers how a firm can succeed in adopting a new pay system
D．tell readers how difficult the management work is
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单项选择题
When a group of immigrants became strong in its economy, they were likely to __________.
A．show prejudice and discrimination against newcomers
B．fight among themselves to establish a more dominating role
C．prevent new settlers from being greatly involved in social activities
D．fight against natives to gain more profits
单项选择题
It can be inferred from the passage that __________.
A．the problem of prejudice and discrimination in the U.S. will be solved soon
B．blacks are free people now, so they can enjoy equal rights as whites
C．prejudice and discrimination are more severe in the South than in the North
D．now there are more blacks living in the North than in the South
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