I ………… Sarah was busy, so I didn’t disturb her.
Correct Answer: GET
The sentence has 2 clauses connected by the conjunction “so”, the second clause contains the word “didn’t”, so we need to fill in the blanks in the simple past tense.
The first clause has the subject “I” (first person singular), the verb “know” is divided into the simple past tense, becoming “knew” (this is an irregular verb).
I know Sarah was busy, so I didn’t disturb her.
Translation: I know Sarah is busy so I don’t bother her.