1） He has a long head.他很有远见!

=He has a long point of view for the future!

for example:

He has a long head, for we can see that he has made the plan for the next 5 years! 他很有远见,因为他已经做好了以后5年的计划!

2） I always burn the midnight oil.我经常熬夜!

burn the midnight oil:熬夜=stay up!

Before the exam, he usually burns the midnight oil.

a dialogue:

-why don't you come online and chat with me?
-sorry, I am afraid I can't.
-why?
-I'm afraid that I can't pass Andy's exam if I don't burn the midnight oil, for andy has said that our exam will be as difficult as band 4 test!
-Oh, you are in hot water now!

That's all for today! See you next time!