用适当的介词填空： The person _______ whom I talked just now was a good friend of mine. 2. The house _____ which I lived was far away from my work. 3. The company ________ which I worked was founded five years ago. 4. The address ______ which my letters were sent was in South Africa. 5. The scientist _____ whom I learned a lot never lost heart when he was in trouble.

with/ to

in

in/ for

to

from