B. Complete the text with the words from the box.

who     which     when     where     whose 

We are living in an age (1) _____ we can. communicate in many different ways. One example is the use of smartphones, (2) ______ main functions allow us to make calls and send text messages. Thus, we can contact someone (3) _____ lives far away from us. With an Internet connection, we can also use a smartphone to send emails, (4) _____ are now more common than traditional letters. We can also use social media, (5) ________ we share information and photos with others.