单项选择题

During the office hours, you should focus your mind on your work.

A．concentrate on
B．complete
C．remind
D．pap for
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单项选择题
Nowadays, we can purchase things on-line.
A．read
B．buy
C．rent
D．watch
单项选择题
Yet in one way they are really so fortunate.
A．to some extent
B．in the way
C．by the way
D．just then
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