问一道英语填空题(用用括号内所给动词的适当形式填空)
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?
We_______ (write) a paper on air pollution these days.
本句应该用什么时态?
英语人气:451 ℃时间:2020-04-05 14:25:13
优质解答
havebeen writing / have written
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