Choose the correct words or phrases. 1 Being reassuring/ cautious/ modest

Choose the correct words or phrases. 1 Being reassuring/ cautious/ modest type, I read the email again before sending it off. 2 Tom and Meg fight constantly they are completely inferior/ infantile/ incompatible 3 It39;s rude to fiddle/ drum/ stand your fingers even if you39;re impatient or annoyed. 4 We need someone really smart. He or she doesn39;t have to be a brainbox/ have a brainwave/ pick his brains though. 5 I know I should get/ talk/ stand up to that girl, but whenever the opportunity arises can39;t say anything. 6 He suffered from polio as a child, and as result, he stumbles/ limps/ wanders.