Rewrite the following sentences so that the second sentence mean the same as the first one

Rewrite the following sentences so that the second sentence mean the same as the first one. 
1.You should use a dictionary to check the meaning of new worlds. (LOOK) 
=>
2."What should we do to make Long feel happier? "they wondered. 
=>They wondered what
3.The last exhibition was not as interesting as this one
=>This exhibition is much