Слова: helped подставить в 3 предл., didn°t подставить в 6 предл., was подставить в 2 предл., were подставить можно и в 4 и в 5 ,
А в чем помочь?? фото отправь!
<span>they were studying at school last year
many people are living in a big city
Why are you crying?
We are reading an interesting book now
they are often playing football at school
</span>
Главное понимать о чём идёт речь и не заикаться