I looked for my pen ___ but didn't find it __(where) 用所给单词的正确形式填空

问题描述:

I looked for my pen ___ but didn't find it __(where) 用所给单词的正确形式填空

I looked for my pen everywhere but didn't find it anywhere.
意思是:我到处找我的笔,哪儿也没找到.