All the measure taken to rescue the miners remaining underground _________.All the measures taken to rescue the miners remaining underground _________.a.were proved effectively b.proved effectivelyc.proved effective d.were proved effective

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All the measure taken to rescue the miners remaining underground _________.All the measures taken to rescue the miners remaining underground _________.a.were proved effectively b.proved effectivelyc.proved effective d.were proved effective
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All the measure taken to rescue the miners remaining underground _________.All the measures taken to rescue the miners remaining underground _________.a.were proved effectively b.proved effectivelyc.proved effective d.were proved effective
All the measure taken to rescue the miners remaining underground _________.
All the measures taken to rescue the miners remaining underground _________.
a.were proved effectively b.proved effectively
c.proved effective d.were proved effective

All the measure taken to rescue the miners remaining underground _________.All the measures taken to rescue the miners remaining underground _________.a.were proved effectively b.proved effectivelyc.proved effective d.were proved effective
a.were proved effectively 被证明是有效的.

D
被动语态
最后用形容词 ,表示手段的有效

所有被用来营救仍被埋在地下的矿工的方法,被证明是有效的!
选择A
或者可以用were proved to be effective.