騷客。眼迷離。

Which is right?

□ 1. My teacher got married young because he believes in love at first sight.

□ 2. My teacher got married young because he believes in love at the first sight.

○1. My teacher got married young because he believes in love at first sight.

   2. My teacher got married young because he believes in love at the first sight.

at first sight是固定語詞，不需要接冠詞。first用於序數時才需要定冠詞，如The first time I saw her I knew she was the one.

"At first sight" is a fixed expression and does not take an article. When first is used as an ordinal word, it often takes the definite article. For example: The first time I saw her I knew she was the one.