YDS NOUNS/ARTICLES/QUANTIFIERS/PRONOUNS / TEST 4 32. Soru
🏆 Bu Testin Birincisi: Meryemp
Başarı Yüzdeniz : 100 %
32.
- At the beginning of the 20th century,
some plastics were made with milk
protein, casein, but apart from by
button-makers, casein plastics are ..........
use today.
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