1.Henry is American,and now he is studying in ____ Beijing U

1.Henry is American,and now he is studying in ____ Beijing University.
A. B.the C.a D.an
2.She has failed twice,but she wants to try ____ third time.
A.an B.a C.the D.
3.Everybody knows that ____ earth moves around ____ sun.
A./,the B.the,the C.a,a D.the,/
4.You may take ____ of the three.
A.any B.either C.both D.neither
5.--How many more bananas can I have?
--You can have one more,____ are for Bob.
A.The others B.Another C.Others D.None
why?