Perhaps a native French speaker can clarify, but looking at examples, "bien assez" appears to correspond to the English "more than enough," which to my mind amounts to "plenty."
I believe it's because "places" is plural and the sentence is only talking about one thing only, and that is the mass of a specific area, so you would not add the "s" at the end. I may be wrong though.
I had the same question but I THINK (and someone correct me if I'm wrong) that since 'place' is a noun you need some sort of determiner (un, une, de, des) before it.
French expressions of quantity commonly use de to link to the thing being quantified
You are making me think really hard. I can't find a reference. You'd use "enough of" with a pronoun. (Is there enough flour? Yes, we have enough of it.) You'd say, "We don't have enough of that color to finish painting the room." But you'd say, "We don't have enough red paint to finish." Other examples: "I have heard enough of Jane's conspiracy theories." "I can't get enough of those Belgian chocolates." "There aren't enough chocolate chips to cover the cake." Here is my rule (others can refine it): if there is no article (a/the), possessive pronoun (his/her/your/its), and no demonstrative adjective (this/that/these/those) with the noun, then "enough" is enough :-)
"enough" can be used as a determiner, pronoun, adverb or even a kind of adjective.
When used as a determiner, as in this exercise, it immediately precedes the noun it is referring to (e.g. enough room) and no "of" is required.
When used as a pronoun it needs the "of" to link to the thing there is enough of (e.g. enough of this talk). "enough" is not used as a pronoun in the Englsh expression "enough room" so that is why KMaryannaV was marked wrong.
Some people have suggested a translation of this exercise as "I have room enough". In this case "enough" is called a postpositive adjective.
"I have enough place" sounds like an unfinished sentence. What would you have enough place for? I can see how a room is a place, so you could possibly use it, but then space is not a place when it comes to talking about the mass of an area. I have never heard someone say "I have enough place" before unlesd they're talking about placing an object or more than one object on or in something.