I am very ____________ about expressing my opinions in public in case I may make mistakes.

Studies show that people are more _____ to suffer from back problems if they always sit before computer screens for long hours.

Come and sit down by the fire.Your hand ________.

After a whole day’s hard work in the field, the old peasant went home, _____. 

 —My son has got a straight A in all his final exams.— What a ____ boy! Congratulations!