问一道英语填空题（用用括号内所给动词的适当形式填空）We_______ (write) a paper on air pollution these days.本句应该用什么时态?

分类: 作业答案 • 2022-07-17 11:21:02

问题描述：

问一道英语填空题（用用括号内所给动词的适当形式填空）
We_______ (write) a paper on air pollution these days.
本句应该用什么时态?

答

have written

答

have been writing / have written