2021高三上·全国·专题练习
1 . ________ safety always comes first, please queue up in lines to enter the hall orderly and do NOT push each other.
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2021高三上·全国·专题练习
2 . George got excellent grades and was admitted into both Harvard and Yale, but he decided to go to Stanford ______ there were many opportunities for people that wanted to work in Silicon Valley. (用适当的词填空)
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