[請益] 幫我看一下這兩句的what/where哪裡不對

[cloud7556 (Chemical Romance)]

這幾天幫學生看一些考古題
發現答案怪怪的
因為題目年代久遠
所以不排除答案有誤
或者是打字錯誤
請版友幫忙確認一下。

1. This is what I need exactly.
           ￣￣
這題我認為頂多就是
This is exactly what I need.
這種說法比較常見
但是我不覺得what在這邊有誤。

2. He went to Venice where he spent his childhood.
                     ￣￣￣
同樣地，關係副詞在這邊我也覺得無誤
除非他的Venice不是我們所認為的Venice
不過這也太詭異..

以上
麻煩版友幫我確認一下
謝謝

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→ zofloya:where前少逗點
推 kerorolover:不會怪阿 我覺得蠻平常的
→ chenzhishun1:me 2.. except perhaps  in the second sentence,
→ chenzhishun1:I'd add the word "had" between "he" and "spent."
→ cloud7556:想到第二句的形容詞子句限定非限定，感謝