过去进行时的用法 — 英语填空题
题目
用括号内动词的适当形式填空：Last Friday evening, while the heavy rain ___ (fall), a strong earthquake suddenly hit the small town. Many people ___ (have) dinner at that moment, so they quickly ran out of their homes. Luckily, when the rescue workers ___ (arrive), they found almost everyone safe on the playground.