Question

ゲストシトロン

10番の問題で、答えが4になるんですけど、which to のtoはどんなはたらきがありますか？
また、whichをなくした文化に直すとどうなりますか？

Q)
ア mended
イ mending
ウ to mend
to nave
(9) Last night Cindy told me about her new jobin Tokyo, (
) she appears to be enjoying very much.
ウ what
ア which
イ where
エ
when
(10) As a child, Derek was exposed to an ideal environment (
ア in which foreign languages to be learnt
ウ learning foreign languages in
イ which to learn foreign languages
エ in which to learn foreignlanguages