确认一下两个英语单句改错。请与高手帮忙。

Question

1.I have two sisters,both of them are doctors.

2.I will give your sister a model plane which she will like to play.

请会改的朋友提供以下答案。
谢谢。因为不太确定。

Answer 1

I have two sisters,both of which are doctors.

I will give your sister a model plane which she will like to play with.

Answer 2

1.I have two sisters,both of whom are doctors.
2.I will give your sister a model plane which she likes to play.

Answer 3

1 both of which
2 play with