答案已經(jīng)修改得更加易懂了,有哪里不懂請(qǐng)?zhí)岢觥視?huì)幫你解釋的,打字真的很累…
這兩個(gè)例句都是正確的.
誠(chéng)然,當(dāng)動(dòng)詞不定式作定語(yǔ)時(shí),to do與所修飾的名詞是介詞+賓語(yǔ)的關(guān)系,（比如這里是live in the zoo）就應(yīng)當(dāng)加上適當(dāng)?shù)慕樵~,使得結(jié)構(gòu)完整.如：Here is a seat for you to sit on.Please give me a pen to write the telephone number with.所以,第二個(gè)例句用了介詞.
但是,當(dāng)名詞為time、place、way時(shí),可以/應(yīng)當(dāng)省略相應(yīng)的介詞（如你句子中的in）,顯得更地道.（這句話是復(fù)旦大學(xué)語(yǔ)法指南上的原話）如：He had no place to live and thus died in the street.
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衷心地祝你快樂(lè)!…