The European Patent Convention, which was implemented in 1977, created a European Patent Office that can issue ____ European patent.
A. a
B. an
C. the
D. no article
Đáp án đúng là: A
Mạo từ không xác định đứng trước phụ âm /j/
Dịch: Công ước Bằng sáng chế Châu Âu, được thực hiện vào năm 1977, đã thành lập Văn phòng Sáng chế Châu Âu có thể cấp bằng sáng chế Châu Âu.
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