one senator said the issue of the threatened environment __ the nation like an exploding volcano

问题描述:

one senator said the issue of the threatened environment __ the nation like an exploding volcano
请问各位括号内填哪个单词才好呢,
strike / separately / confusion / downward / mention / imply

strike
这里要填一个动词作谓语,所以separately和confution不能用.
从意思上说,其他的词也不合适.