18 Greet an American with a ..... handshake.

Analysis:

The sentence describes a type of handshake that is appropriate for greeting an American. A 'firm handshake' is generally considered polite and professional in Western cultures.

Breakdown:

• A heavy: Incorrect. 'Heavy handshake' is not a standard idiom.
• B hard: While 'hard' can relate to firmness, 'firm' is the more idiomatic and commonly used adjective for a handshake.
• C firm: Correct. A 'firm handshake' conveys confidence and sincerity.

Translated Question:

18 Поздоровайтесь с американцем ..... рукопожатием.