用所给词的填空。 
for    with     about     in      at
（1）I was in the UK _______ three year.    
（2）How ___________ your school?
（3）There’s a TV _____________ my classroom. 
（4）Lingling is in London_______ Sam and Amy.      
（5）I’m going to do my homework _______ 6 o’clock.