Select the most appropriate option to fill in the blank.
As soon as she opened the cages, the birds _________.

Correct option is B

The correct option to fill in the blank is (b) flew away.
Explanation:
The sentence refers to a completed action in the past. Hence, the simple past tense "flew" is the correct verb form.
Grammatical Rule Used:
Use simple past tense when both the actions are completed in the past and linked by "as soon as".
Example:
As soon as I entered the room, the lights went out.
Other options:
· (a) flown away – past participle; incorrect without "had/have"
· (c) fly away – present tense; doesn’t fit the past context
· (d) flies away – present simple; used with singular subject
Information Booster:
“Flew” is the simple past of “fly,” and “flown” is used with auxiliary verbs (have/has/had).