关于英语和数学的几道问题1.( )Millie wants to know some information about

关于英语和数学的几道问题
1.( )Millie wants to know some information about the air tickets_________these countries.
A.for B.around C.to D.with
2.( )Is ______in Denmark?
No,it's in Engiand
A.the Learning Tower of Pisa B.the Statue of Liberty
C.the Little Mermaid D.the Tower Bridge
3.( )The radio is ______a strange signal .What's wrong with it?
A.giving up B.giving in C.giving out D.giving away
4.若k=c分之a-2b=a分之b-2c=b分之c-2a,且a+b+c不等于0,k=______