A1. 1-d, 2-b, 3-c, 4-a
A3. 1-c, 2-d, 3-a, 4-b
B1. Unusual, surprised, peaceful
C1. 1. If you're ashamed of telling the truth.
2. A white lie doesn't put you in much trouble but a black lie does.
3. If you're a bad lier, you blush and don't look at partner's eyes. That may cause suspicion.