the secret _________ how life on earth began (地球生命起源的秘密)
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请根据Text B的PPT、词汇学习笔记或者生词本等, 在下面的每一个空格处填上一个合适的单词。由于提交后不能修改，请大家检查清楚了再交。a __________ job (临时工)
a business __________ (生意上的挫败)
Our team was __________ by three goals to one. (我队以3比1被击败。)
China has become an __________ country in the world. (中国已经成为世界上有影响力的国家了。)
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