To help a 7-year-old overcome bedwetting, Dr. Howard Bennett reaches for red water balloons and a superhero named Bladderman. Bedwetting is a problem for many children age 6 or older.

     Alarms and medicines are available, but understanding how their bodies work for many kids is the key to staying dry. Bennett published a book that’s aimed directly at children, not just their parents to help understand bedwetting so that children understand accidents aren’t their fault－it’s not a matter of willpower but of biology－and to outline research-backed steps they can take to help stay dry.

     Bedwetting is hard on youngsters’ self-esteem (自尊). They may decline sleepovers or feel anxious about camp, such as doing their own laundry, to hide the problem. Bennett even had a 9-year-old patient whose younger brother discovered his bedwetting and used it blackmail.

     Children usually get nighttime bladder control between ages 3 and 5. The brain and bladder must learn to work together: First, the bladder signals the brain that it’s filling. The brain then either signals back for the bladder to relax and hold more overnight, or signals the child to awaken. Boys are twice as likely as girls to experience delays in nighttime bladder control.

     For children who don’t want to wait it out, there are ways to help. Most common are alarms that make a sound when they sense wetness. The alarms, which cost from $ 60 to $200, can help train children to wake up. “But the education is important,” stresses Dr. Patrick McKenna. Good training in how the bladder works and how to control it can meet the devices’ effect.

1．The passage mainly tries to tell readers that __________.

     A．bedwetting is a common thing for children

       B．boys are easier to have bedwetting

     C．children’s bedwetting can be overcome                                

       D．bedwetting is a matter of biology

2．According to the passage, bedwetting happens mainly because _______.

     A．brain doesn’t signal them to awaken                                        

       B．these children’s bladders are smaller

     C．they are too young to control themselves                                  

       D．they have too much water before sleep

3．The contents that follow the last paragraph of the passage will be ___________.

     A．how the alarms work in treating bedwetting

B．how to educate children to avoid bedwetting

     C．how bedwetting works for the children

D．how to build youngsters’ self-esteem

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