单项选择题

When a space shuttle has accomplished its （），itcan be ready for another trip in about two weeks.

A.venture
B.mission
C.commission
D.responsibility

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单项选择题
A．It had caused embarrassment to the British government.B．It had brought her closer to the ordinary people.C．It had greatly promoted her popularity.D．It had affected her relations with the British government.
A.It
B.
B．It
C.
C．It
D.
D．It
E.
单项选择题
技能分为智力技能和动作技能两种。技能通过多次操作，发展为( )。
A.经验
B．能力
C．技巧
D．学力
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