barriers estimated Thanks to transfer payment It is _____ that the number of smartphone users is going to shoot up to six billion globally. Mobile ______ is now a normal part of life in China, and the trend is also sweeping other nations. The Internet is breaking the ______ of space and time in communicaton. With mobile banking, people no longer need to go to the bank to ______ money. _______ the fast development in the social media, we can stay in touch with friends and family far away from us.