单项选择题

After seven years’work, Chinese scientists ________ the task of launching their country's first spaceship in seven years.

A．achieve
B．accomplish
C．fulfill
D．complete
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单项选择题
The council was asked to ________ the engineer's estimates for the coming year.
A．answer
B．approve
C．confirm
D．converge
单项选择题
The old building is in a good state of ________ except for the wooden floors.
A．observation
B．preservation
C．conservation
D．compensation
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