[单选题]The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Choose the missing words of the phrase or sentence.


Surveys show that the average office worker sends and receives 108 e-mails a day. Even when we manage to clear out the in-box and escape our desks, most of us are still reachable by cell phone or some other handheld device. These gadgets add convenience and fun to our lives, but there’s a price to be paid.

With new technologies work （）up more of people’s private time.