If (如果) you have problems (问题),you can ask Tom _____ help.
--what is Mum cooking in the kitchen? " --Fish, I guess. How nice it!
the movie star goes, there are lots of fans waiting to see her.
--Mum, we have to buy some more salt. -- .There is enough salt in our country.
You drink wine before driving, or the police will take your license away.
--Wish you good luck in the exam. -- .The same to you,