Answer: 1a: ‘comb our heads’ and ‘got on my mark, bringing my eyes back to the book’
Explanation: 1a: This is an idiom, as you do not actually comb your head, but rather your hair.
1b: No-one goes to a specific mark as they’re about to read a book, and you don’t (and physically can’t) drag your eyes to said book.
Hope this helped! Have a marvellous day!
