Ответ:

1 — B: biting one’s lip often shows nervousness or that a person is holding something back.

2 — C: raising the eyebrows usually shows surprise or interest.

3 — A: shrugging the shoulders means “I don’t know” or “I don’t care”.

4 — D: tapping one’s foot shows impatience or annoyance.

5 — E: scratching one’s head often shows confusion.

6 — F: clenching one’s teeth can show anger while trying to stay quiet.

Ответ: 1–B, 2–C, 3–A, 4–D, 5–E, 6–F.