5. Who are you writting to for help?

你在给谁写信请求帮忙？

还能这样说：

To whom shall you write for help?

To whom are you going to write for help?

6. I wrote the letter at her dictation.

我照她的口述写这封信。

还能这样说：

I composed the letter at her dictation.

I wrote the letter according to her dictation.

应用解析：

be dictated to 被任意指挥；

follow the dictates of 听从……的命令（支配）；

dictate to 口述，使听写

7. I wish that he wrote more often.

但愿他能经常写信。

还能这样说：

I am looking forward to his regular letter.

I hope he can often write to me.

谚语：

A little body often harbors a great soul.

莫道身躯小，伟人寓其间。

8. Put your pen on that piece of paper and write your apology to Amy.

赶紧动笔，给艾米写信道歉。

还能这样说：

You should write to Amy rapidly for her forgiveness.

Write to Amy right now to apologize to her.

应用解析：

drive a pen 挥笔写字；

live by one's pen 以写作为生；

put pen to paper 着手写；

wield a caustic pen 笔下锋利，行文尖刻