________ more than one hundred elements are known, only twenty-five of them are common and important. <br> <br>A、Although<br>B、Since<br>C、Whatever

________ more than one hundred elements are known, only twenty-five of them are common and important.

A、Although
B、Since
C、Whatever

出自：2023年初级学期期末统一考试英语机考

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