Rewrite the sentences so that the meaning doesn't change:

Rewrite the sentences so that the meaning doesn't change:
1, Shall we use gas instead of burning coal?
-> How about .......................................................
2, I think it is better to wait for the next bus.
-> I suggest..................................................................
3, I hope to see you at Chirstmas
-> I'm looking ...............................................................
4, He studies hard or he won't pass the examination.
-> He wishes ........................................................................