过去进行时的构成与用法 — 英语词汇题

When the storm came, Lucy was doing her homework at home. Her mother was cooking…

选择填空：Last Saturday afternoon, a heavy storm arrived at 3:00. Before th…

根据句意，用所给动词的适当形式填空，使句子表达过去某�…

Mia started cleaning the room at 9:00 and stopped at 9:20. At 9:10, she ___ the …

根据中文提示补全括号中的词组，使句子表达“过去某一时�…

根据句意和提示补全单词，使句子表达过去某一时刻正在进�…