Fill in: selfish, sociable, pessimistic, shrugged, clenched, patient, reliable, stubborn, shy, insincere. 1 He was so angry he clenched his fists tightly.

1 clenched
2 sociable
3 pessimistic
4 patient
5 reliable
6 insincere
7 selfish
8 shy
9 shrugged
10 stubborn