用所给词的恰当形式填空
1.It's fun____(play) table tennis with you.
2.Is it a good idea ___(make) an e-mail friend?
3.Have you ever been to an ____(Enlish-speak) country?
4.When I waseight years old,I started_____(play) the piano.
5.Please tell me your reason for ____(be) late.