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The event included a number of lectures and workshops that w

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The event included a number of lectures and workshops that were __148__ to the public.
A.open B.opened
请问为什么这里不能用opened?
The event included a number of lectures and workshops that w
open 在这里作形容词 be open to 对…开放
再问: 3Q,原来这里做形容词了,那为什么不能用opened?被对公众开放?
再答: open 表示一个状态 正在开放着。。如果是be opened 话 表示被打开这个动作