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题型：单选题题类：常考题难易度：普通

江苏省徐州市2020届高三上学期英语期中考试试卷

LED lighting, even in most developed countries, ________ long enough to know its effects across the human lifespan.

A、has not been used B、was not used C、had not been used D、is not being used

举一反三

In the last few years, China ___ great achievements in environmental protection.

These trees are not going to {#blank#}1{#/blank#} (cut) down.

在中国，尊重老师被认为是非常重要的。(consider)

I was sent to the village last month to see how the development plan ________ in the past two years.

—Is this the first time you ________ Harbin?

—No. But the first time I ________ here, the city wasn't so beautiful.

If I am{#blank#}1{#/blank#}（挑选）as monitor of our class, I will continue with my efforts.

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