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题型：单选题题类：常考题难易度：普通

黑龙江省哈尔滨师范大学附属中学2021届高三上学期英语期中试卷

Scientists say it may be a few months____vaccination(疫苗接种) for the epidemic of COVID-19 is widespread throughout the country.

A、until B、after C、before D、since

举一反三

— Have you got the results of the final exam?

— Not yet. It will be a few days ______ we know the full results.

It is five years _____his father worked here.

You won't find it difficult ______ you have mastered it.

________ I achieve something in my studies, my mother has a big smile on her face.

One Friday, we were packing to leave for a weekend away my daughter heard cries for help.

The woman was about to open the door ____________ she heard a strange sound from inside.

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