Question

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（13）の問題はwhoeverが正当なのですが、なぜwhoではダメなのでしょうか。

教えていただけると助かります。

7.1 went
8. Many young parents do not know (why/ what
9.1 prefer popular music (to/than /better than) the classics.
10. Ted is (senior / more senior) to me at the office.
11. Lake Biwa is (the largest of / the larger of / larger than) any other
12. Your present is (smaller/ the smaller / the smallest) of the two *p
13. We will accept (who / whoever / what) wants to join us.
T所に適語を入れなさい。