Every means______tried out but never with success, as far as my knowledge goes.A

游客2023-11-20 71

问题 Every means______tried out but never with success, as far as my knowledge goes.

选项 A、is
B、are
C、has been
D、have been

答案 C

解析

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Inhis_________tofurtherhisknowledgeoftheuniverse,manhasnowbegunto