What does the word "it" in bold and underlined refer to? A. Knowing the type of restaurant

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What does the word "it" in bold and underlined refer to?

Knowing the type of restaurant

Clear instruction

Learning the proper etiquette

Sensitivity

Giải thích

Đáp án đúng: C

Giải thích: dựa vào câu “Learning the proper etiquette in a particular type of restaurant in a particular area may sometimes require instruction, but more commonly it simply requires sensitivity and experience.”

Dịch: Học các nghi thức thích hợp