阅读理解。 A child's birthday party should be one of the most fun events of the year, for the birthday child, the guests and even for the hosts. The three keys to a successful child's birthday party is planning, more planning, and even more planning. Kid's birthday party games are important ingredients of every party and must be thought out and arranged in advance. Luckily, there is no shortage of fun and interesting games to keep kids busy and happy, so it is not difficult to come up with more than enough ideas. It is important to remember that children have a far shorter attention span (长度) than adults. For that reason, the host should not expect that one or two activities will keep the guests entertained for a long period of time. Plan a lot of short, fun games that will satisfy their needs. Make sure that the games are age appropriate:'duck duck goose' will keep little ones happy for a while, but certainly will not work for pre-teens. 'Scavenger or treasure hunts' are great kid's birthday party games for any age-just make sure that it's neither too difficult nor too simple． Be sure to have enough ideas in mind so that it is possible to 'throw away' an activity that is not going well. Kid's birthday party games should be simple and fun. If a game is started and no one seems to be having any fun, simply end that activity and start another. Kids like changes and will not mind a bit. If the party is held indoors, it is a good idea to clear a room of breakables and make that room the game headquarters. For outdoor parties, make sure that the play area is free from potential dangers and that the games do not involve tree climbing or other activities that are likely to cause injury. Finally, remember to have prizes and treats on hand to reward the players. Prizes do not need to be large or expensive. Kid's birthday party games are about teamwork, not rewards. Be sure to have prizes not only for the winners of the games, but for every child in attendance, so that each child goes home with some fun memento of the party and the time spent with friends. 1. What is/ are the most important thing(s) for a successful child's birthday party according to the passage? [     ] A. Planning B. Games C. Food and drinks D. Prizes 2. Many games should be planned for a child's birthday party because _____. [     ] A. the party will be held for a long time B. there will be many guests C. children can't focus on one thing for too long D. adults will enjoy the games, too 3. When children seem to get bored with a game, parents should _____. [     ] A. encourage them to carry on B. show them how to enjoy it C. make the game more difficult D. start another game 4. What does the underlined word 'memento' in the last paragraph most probably mean? [     ] A. moment B. memory C. prizes D. games 5. We can infer from the passage that _____. [     ] A. If not rightly planned, a child's birthday party can be boring to children B. Children will enjoy a birthday party anyway C. Children who like playing 'Scavenger hunt' will also enjoy 'Duck duck goose' D. It would be better to play indoors than outdoors, because outdoor parties can be dangerous