1bright student
model student
2to try to make yourself very similar to someone else
model yourself on someone
3be pride of
pride yourself on + ing
5inadvertently reveal something secret
give the game away
6hours straight
hours without fail
8to be so good that another person or thing does not seem important or worth very much
put/leave someone in the shade
10the point directly underneath the observer
nadir
11to make someone or something more lively
give someone a new lease of life
12promote friendly relations between groups
build bridges
13a small piece of card with new stamps inside
book of stamps
14according to the rules
by the book
15a group of people who look for someone who is lost
a search party