单项选择题

Careful testing is necessary before any more experiments can continue with the exploring submarine.

A. needful
B. in need of
C. necessity
D. of necessity
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单项选择题
There must have been someone who has instigated a rebellion because the people are so well organized.
A．incited
B．tampered
C．intruded
D．meddled
单项选择题
His major task is to integrate the work of Various bureaus under the ministry.()

A. organize
B. correspond
C. coordinate
D. respond
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