He was surprised that his answer had caused such a strong________(react)

He was surprised that his answer had caused such a strong________(react)

reaction
【评分参考】
（1）本题共10分，填 对 一个给1分。
（2）词形转换正确，有拼写错误，但不引起误解，累计每两个扣1分。
例如：将 conceivable 写成 conceiveable 。
（3）词形转换错误，不给分。