Question

1:The electric light is a(n) _______ of Thomas Edison. (INVENT)

2:Congratulations! Your answer is _______ right. (COMPLETE)
3:The film we watched on TV last night was very interested. (INTEREST)

Answer 1

1. an invention

2. completely

3. interesting

Step-by-step explanation:

Since the word "invention" begins with a vowel sound /ɪnˈvɛnʃn/, we should use the indefinite article "an". As for "interested": the adjectives that end with "-ed" describe some sort of condition, feeling of either thing or human, temporary in general; the adjectives with "-ing" describe some kind of quality, generally permanent. Therefore, we should use "interesting". The rest is contextual.