Question

2. --- Why? Tom, your shirt is so dirty! --- Mum, I ______ my storeroom downstairs.

2. --- Why? Tom, your shirt is so dirty!
--- Mum, I ______ my storeroom downstairs.
A cleaned B have cleaned c was cleaning d have been cleaning
正确答案是c，两个问题：
1 why在此题中意思，为什么这么使
2为什么选c

Answer 1

why是为什么 也相当于 Tom, why your shirt is so dirty! 只是疑问词提前了
因为Tom说他的衣服脏了是因为在楼下打扫 所以是用过去时

追问

正确答案是过去进行时

Answer 2

这题我感觉应该选B吧