1.the
only后面用that没错。此处省略了that,还原应该是he
is
the
only
one
for
whom
"that"
i
have
my
most
respect.定语从句中that可以省略。
2.此处的for应该是respect
for
sb中的介词,介词提前了。所以此处的for后面加的应该是人称代词,而不是物主代词。因此应当为“whom”为而不是“which”。
这里你应该理清这句话的结构:主语:he,谓语:is,宾语:the
only
one,定语:i
have
my
most
respect
for。不用从句就应该是:he
is
the
only
one.
i
have
my
most
respect
for
the
one.