Question

31. I think his uncle is........ lunch, (at, to, with) 32. Have a look...... the mirror. (in, at, on)​

Answer 1

31. at

32. in

Step-by-step explanation:

at is used as an adverbial pronoun to indicate where, when or how an action takes place

We look (in) the mirror to see our image and adjust our dress

Answer 2

I think his uncle is at lunch .

Have a look in the mirror .