drop A in line
Aに手紙を書く
stand for
〜を表す,象徴する

Try to make as many friends as you can

We don't particularly think it odd that
→think O C 5文型

I definitely saw my brother walk hand with your sister.
→知覚動詞seeの後ろはV原形不定詞かVing現在分詞がくる

Most tourists don't visit that part of town.
mostを形容詞で利用
most名詞→most of the tourists

The naive customers were easily taken in by the...
take in だます

I took
It took me an hour and a half / one and a half hours