Multiple receviers and attachment

Hi.

Could you please tell me, how can I add an attachment to the mail ?
The second question is how to add many addresses to mailTo and to cc at the same time? 

For example, I'd like to send an email with html content and some file attached to alice@gmail.com and bob@gmail.com and also send copy to cris@gmail.com and to david@gmail.com.

Is it currently possible?

Thanks in advance.