Exercise 6. Match the adjectives to their opposites.

1 — c (optimistic — pessimistic); 2 — a (shy — confident); 3 — b (selfish — generous); 4 — e (reliable — unreliable); 5 — d (stubborn — flexible); 6 — insincere (sincere — insincere); 7 — i (sensitive — insensitive); 8 — f (sociable — unsociable); 9 — h (patient — impatient); 10 — g (easy-going — irritable).