试题题干
Translate the following sentence into Chinese.
We knew that something was up because an earthquake had not occurred there historically and yet a large amount of strain needing to be released had accumulated.
参考答案
试题解析
考点：historically历史上地；a large amount of strain 巨大的压力；release释放；accumulate积聚。
句子结构：句子主干为We knew，that引导宾语从句解释knew的内容，从句中because引导原因状语从句。