问题

Why? Tom, your shirt is so dirty! — Mum, I ＿＿ my storeroom downstairs。

A:cleaned
B:have worked
C:was cleaning
D:have been cleaning

正确答案是：

同类题型

I prefer ________ at home rather than_________ out for a picnic on a rainy day.

It________hard now，otherwise we could have a barbecue on the beach.[ ]

下列各句中，没有语病的一句是（）

My teacher’s words had a great _____my studying science at college.

The little girl sat at the door with her legs ___ and kept her eyes ___at the planes flying in the sky.