2 a The domestic car market showed an growth of 50% for three consecutive years from 2001 to 2003.
b The domestic car market grew by 50% for three consecutive years from 2001 to 2003.​

a. The domestic car market showed an impressive growth of 50 % for three consecutive years from 2001 to 2003.

b. The domestic car market grew impressively by 50% for three consecutive years from 2001 to 2003.​

Explanation:

In the given question, the word to be used in the blanks depends on the structure of the sentence. While an adjective describes a noun, an adverb describes or modifies a verb.

Now, the given sentences will use the same word in their adjective and adverb form. And the pair of words to use in the two sentences are-

a. The domestic car market showed an impressive growth of 50 % for three consecutive years from 2001 to 2003.

b. The domestic car market grew impressively by 50% for three consecutive years from 2001 to 2003.​

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