选C
i hope that she will answer my letter
我希望她会给我回信
hope用作动词时,后面可接不定式或that从句,但不能接“宾语+不定式”.如：
①We hope to see you again．（= We hope we can see you again．）
我希望能再次见到你.
②I hope you can help me with my maths．
希望你能帮助我学数学.
（不能说 I hope you to help me with my maths．）