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.