<span>seventeen to the extent of six sevenths</span>
How many meters are in a kilometre?
How many babies are born every/each year?
How much does an African elephant weight?
How much rice so chinese eat per day?
How many people can a jumbo jet carry?
Our society begins to think about ecological problems.
Вообще-то это очень легко. Просто ставишь was/were и ing окончание в Past Progressive
1.was playing
2.was crying
3.were watching
4.was cleaning
5.were visiting