Question

@.

なんで3になるんですか！！？、

2of you were to put a bag over your nose and mouth (1to catch the air you breathe
out, you would find some strange changes. oThere would still be the same amount
of nitrogen. eThere would also be the same traces of rare gases. oBut there would
be much less oxygen anda hundred times more carbon dioxide than in the (2)air you
breathe in. There would also be considerably more water vapor.
~1
Q3 (1) to catch は [①名詞的/②形容詞的/③副詞的]用法の不定詞
Q4、(2) air の後ろに1語を補うとすれば, その語は?
(which )
23)
(→ p.12 0)