用who,whom,that,which填空

问题描述:

用who,whom,that,which填空
1.this is the best film ---------- Ihave ever seen.
2.they are looking for the nurse ---------- looked after their little son.
3.Last weekend we went to see the film --------- was directed by Zhang Yimou.
4.He has some friends ------------- can help him a lot.
5.this is the teacher from -------- we've learned a lot.

1 that
2 who 或者 that
3 that 或者 which
4who 或者 that
5 whom