Special usage of adverb?

[Duc]

Please look at the exercise below:
Put the correct forms of the suggested words into the blank:
Although some societies are.............. undeveloped,their language are very complex.
(technology)
The answer is Technological but I think it should be Technologically because adverb must be put before adjective.
Please explain it to me.
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Don't see your shade think you are great

[Mister Micawber]

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You are right; the answer sheet is wrong.
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Native English teacher at Mister Micawber's

[Yankee]

Hi Duc

Are you keeping a list of all the corrections that need to be made in that book you're using?
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[Duc]

Very funny,Amy
Indeed today I went to class and it is one of the exercises my teacher gave me. So,her book is incorrect ,not mine
_________________
Don't see your shade think you are great

[Lost_Soul]

My advice - throw the book in a trash can, unless your goal is to correct it of course