The proposal, ______ I agree, is unfortunately not accepted by my partner, so I'm afraid you'll have to come up with another.

(A)that

(B)which

(C)to which

(D)in that

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.answer:  ( C )

agree 是不及物動詞,故不可直接接which作agree的受詞,必須在which前加上to方可形成"agree to"的用法.

The proposal, which I agree to, is unfortunately not accepted by my partner.....