سؤال قواعد ستيب محلول — اختيار الجملة الصحيحة (تدريب 5000)

To which sentence from the paragraph can we add the following clause? Since she was living in Saudi Arabia, [1] Sarah wanted to learn Arabic. [2] To start, she made a flash card for each letter with an English transliteration written on the back. [3] She practiced with the flash cards until she memorized the entire Arabic alphabet. [4] Then she bought children’s books to read until she built up her vocabulary and learned basic sentence structures.