Select the most appropriate option to fill in blank 2.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. seen.
The verb "have" in "have even _____ them" suggests that the missing verb should be in the past participle form (V3) after "have."
The sentence refers to the completed action of seeing, so present perfect tense should be used.
"Seen" is correct because "have + object + v3" is the correct structure for present perfect tense.
Explanation of Incorrect Options:
See – V1 or base form, is used in simple present tense.
Seeing – Incorrect because it does not fit the verb pattern.
Saw – Past tense contradicts "have."
Hence, the chosen option is correct.