21. I can’t believe Helen married our Math teacher Mr. Lu ________ she hated most in high school.
(A)who
(B) whom
(C),who
(D) ,whom
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統計: A(28), B(63), C(22), D(89), E(0) #1571059
統計: A(28), B(63), C(22), D(89), E(0) #1571059