阅读下面对话，掌握其大意，并根据所给字母的提示，在标有题号的右边横线上写出一个英语单词的完整、正确形式，使对话通顺。
J =" John      " R = Robert
J:  I hear that an important meeting is to be ( 76 ) h       in our    76.           
city. What’s it about?
R:  It’s said that its (77) g       is to make clean drinking         77.         
water available to all.
J:   Who do you know will (78) t        part in the meeting?      78.       
R:   Representatives from more than 80 countries, as is
(79) r       on TV.                                        79.      
J:   Could you tell me (80) m       ?                         80.        
R:   Sure! Three things will be (81) d         at the meeting       81.        
—ways of making good use of water, (82) r       water      82.         
pollution and saving water.
J:   That’s good news for people in this area. As you may know,
there are too (83) m       factories around here, which let     83.        
out plenty of poisonous gas and polluted water. So we eagerly
hope that strong (84) m        will be taken to stop the        84.       
water pollution.
R:   I quite agree with you. Let’s hope for the day to come as
soon as (85) p        .                                 85.