do you know the (important )of trees in our daily lives? 适当形式(be) you reading newpaper at 7:00 last night?

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do you know the (important )of trees in our daily lives? 适当形式(be) you reading newpaper at 7:00 last night?
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do you know the (important )of trees in our daily lives? 适当形式(be) you reading newpaper at 7:00 last night?
do you know the (important )of trees in our daily lives? 适当形式
(be) you reading newpaper at 7:00 last night?

do you know the (important )of trees in our daily lives? 适当形式(be) you reading newpaper at 7:00 last night?
importance
were

importance,句意是你知道树木在我们生活中的重要性吗?由此可判断出这里要用的是important的名词形式,故用importance

importance 名词形式
were 过去式