Some of the answers in the answer key to exercise F seem vague to me.
For example, (lines 13, 14, and 15)
"A company that produces fewer than eight or ten titles a year is most likely a two- or-three-person operation,..."
The answer key for 14-15 indicates that a
" A Suspended compound: " two- or three-person operation." Make sure the hyphens and word spaces are indicated correctly."
Other examples included are:
The fourteen- and fifteen-year-old students attended.
Steel-plated or -cased vaults were used.
I feel like the correct answer should be a two-or-three person operation. The explanation doesn't clarify the answer to me. When I look up hyphenated compounds the only explanation that I can find says, "if it is not listed in the dictionary then there is no hyphen." There has to be a better explanation. I find this confusing.
Also, I feel unclear about lines 27- 28,
"books, computer books, gardening books, cook- books, and every stripe of how-to-books."
The answer key for line 28 states that
"Dictionaries show a hyphen in the adjective how-to, but there's no hyphen between the adjective how-to and the noun book.
and then changes "how-to-books" to "how-to book".
I am confused about the placement of the hyphens, and why the the plural form of book becomes singular in the answer key.