True, gas exchanges occurs in the lungs
1. in and of.
2. in.
3. to.
4. of.
5. into (off could be a preposition but in this case is part of the phrasal verb 'to send off')
<span>One of the effective attitude is being ‘responsible’ where the person owns his
statements by saying ‘I’ in all the things he would say, instead of ‘we’.
Example, ‘We don’t like the way you act a while ago.’ Change it to ‘I don’t
like the way you act awhile ago’. Here, you are establishing ownership on the
things you want to say to the person.</span>
