помогите составить предложения с этими словами

to prepare for smth. – _________________________________________; 
to be greatly surprised – _________________________________________; 
in silence – _________________________________________; 
to be confused – _________________________________________; 
to compete in smth. – _________________________________________; 
for smb’s sake – _________________________________________; 
to do research – _________________________________________; 
to be defeated – _________________________________________;