急求...英语题解答Put in the missing words or expressions without re

急求...英语题解答
Put in the missing words or expressions without referring to the text until you finish finish them:
1、People can send E-mail through a ( ).
2、At fist you log into a certain network station and open your ( ).
3、Click the ( ) link on the navigation bar.
4、Enter the ( ) in the To field.
5、You can compose your inforation in the ( ).