Fill each blank with ONE suitable word. Write your answers in the numbered blanks provided below the passage.

(0) has been done as an example. Cell Phones Cell phones have been popular in Japan (0. since) the early 1990s, but it was (1)________ until 1999 that their use really took off. The age of cell phones has emerged, but with it come problems. Cell phones are used on buses and trains, in restaurants, and in all areas of (2)________. They cause problems when they (3)________ during meetings, concerts, weddings, or even funerals. What's more, people speak loudly in public, and students read and text messages during lessons. (4)________ seriously, when a cell phone is used near a person (5)________ a pacemaker to fegulate his heartbeat, its radio waves     may interfere with the functioning of the pacemaker. Now, something is being done to solve  these (6)________. In many places, new technology is being used to block cell phone calls. Airline (7)________ are requested to stop using cell phones while on board. Concert halls ask their audience to switch their phones to the (8)________ mode. However, phone users fear that if they do not (9)________ their phones, they will lose valuable business opportunities. That's why many do not (10)________ off their phones even when they are asked to.

Cell phones have been popular in Japan (0. since) the early 1990s, but it was (1)_______ until 1999 that their use really took off.