Special usage of adverb?

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.
The answer is Technological but I think it should be Technologically because adverb must be put before adjective.
Please explain it to me.

You are right; the answer sheet is wrong.

Hi Duc

Are you keeping a list of all the corrections that need to be made in that book you’re using? :wink:

Very funny,Amy :stuck_out_tongue:
Indeed today I went to class and it is one of the exercises my teacher gave me. So,her book is incorrect ,not mine

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