第 21 至 30 題為題組          Generally there are two ways to name typhoons: the number-based convention and the list-basedconvention. Following the number-based convention, typhoons are coded with __21__ types of numberssuch as a 4-digit or a 6-digit code. For example, the 14th typhoon in 2003 can be labeled either as Typhoon 0314 or Typhoon 200314. The __22__ of this convention, however, is that a number is hard to remember.The list-based convention, on the other hand, is based on the list of typhoon names compiled in advance bya committee, and is more widely used.          At the very beginning, only __23__ names were used because at that time typhoons were named aftergirlfriends or wives of the experts on the committee. In 1979, however, male names were also includedbecause women protested against the original naming __24__ for reasons of gender equality.         In Asia, Western names were used until 2000 when the committee decided to use Asian names to __25__ Asians’ awareness of typhoons. The names were chosen from a name pool __26__ of 140names, 10 each from the 14 members of the committee. Each country has its unique naming preferences.Korea and Japan __27__ animal names and China likes names of gods such as Longwang (dragon king)and Fengshen (god of the wind).         After the 140 names are all used in order, they will be __28__. But the names can be changed. If amember country suffers great damage from a certain typhoon, it can __29__ that the name of the typhoonbe deleted from the list at the annual committee meeting. For example, the names of Nabi by South Korea,and Longwang by China were __30__ with other names in 2007. The deletion of both names was due tothe severe damage caused by the typhoons bearing the names. 
(AB) request (AC) favor (AD) disadvantage (AE) composed (BC) recycled(BD) practice (BE) replaced (CD) raise (CE) various (DE) female
【題組】21.