Oil is essential for_______ manufacture of______plastics.
Kiến thức: Mạo từ
Giải thích:
Chúng ta dùng "the" khi danh từ chỉ đối tượng được cả người nói lẫn người nghe biết rõ đối tượng nào đó. Trước danh từ không đếm được “plastics” không dùng mạo từ
Tạm dịch: Dầu là thiết yếu cho sản xuất nhựa.
Chọn B
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