A：It's very late．Are you still on the computer？
B：Well，yes．（66） ______
A：What kind of e-mails？
B：Some are messages from my teacher and some are from my friends．
A：Do you have to write them back right away？
B：（67） ______ ．Usually people want a quick reply．
A：（68） ______ ．
B：I've already had 50people's address in my address book!And（69） ______
A：（70） ______ ．E-mail is really very convenient（方便的）．

A．I think e-mail is one of the best ways to communicate with others． B．I've got so many e-mails to go through． C．I agree Will you． D．Of course! E．How many e-mails addresses have you had？ F．I feel like playing computer games． G．I am not sure whether I'm right or wrong．