问题描述：
有关新概念英语的几道问题
1.Why Tom,your shirt is so dirty!
Mum ,I ______ my storeroom downstairs.
疑问：为什么是was cleaning 而不是have cleaned 这里动作已经结束并且对现在又影响,衣服脏了.
2.Listen to the two girls by the window What language _________
疑问：为什么是are speaking而不是were speakihg?
1.Why Tom,your shirt is so dirty!
Mum ,I ______ my storeroom downstairs.
疑问：为什么是was cleaning 而不是have cleaned 这里动作已经结束并且对现在又影响,衣服脏了.
2.Listen to the two girls by the window What language _________
疑问：为什么是are speaking而不是were speakihg?
问题解答：
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