stones,wood and bricks were uesd 对stones,wood and bricks划线部分提问请说明这么做的原因

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stones,wood and bricks were uesd 对stones,wood and bricks划线部分提问
请说明这么做的原因

What were used? stones石头 wood木头 bricks砖 这三个词都是名词,提问名词用what提问.

what are used?
希望对你有帮助
划线部分是主语名词 根据这一点用what问主语是什么