Максимальное количество . 8 надо. ​

1. I have to write a report in History every week.
Do you have to write report in history every week?
No, you don't have to write a report in history every week.
2. Mike has to go to his music class every evening.
Does Mike have to go to his music class every evening?
Mike doesn't have to go to his music class every evening.
3. Yesterday my parents had to meet me at the station at 6 o’clock.
Did your parents have to meet you at the station at six o'clock yesterday? 
No, your parents didn't have to meet you at the station at six o'clock yesterday.
4. Last month Boris had to clean his classroom every day.
Did Boris have to clean his classroom every day las month?
No, Boris didn't have to clean his classroom every day last month.
5. Next week we will have to do 3 tests in English.
Will you have to do 3 tests in English next week?
No, you will not (won't) have to do three tests in English next week.

Flood is a natural disaster. For people, who are directly affected by it, it can be devastating. There are several reasons for floods. One of them is excessive raining. At other times it is caused by the overflow of rivers or dam breaks. At any case it has negative outcomes, which lead to environmental and economic loses. As a result land gets washed away, houses are destroyed, people and animals die. Floods are directly connected with climate and geography of the area. Some places are more exposed to heavy rains than others. For example, Bangladesh and the Philippines are under constant threat of floods.