Question 1. In future cities, it is necessary that solar panels on rooftops power skyscrapers. SHOULD Question 2. It's not good for you to live in this mega city because it is noisy and polluted. SHOULDN'T Question 3. A lack of housing affordability, started in 2020, made people move from the city. SINCE Question 4. For the past decades, new advancements in technology have widened the gap between children and adults. A FEW DECADES AGO Question 5. Many people have exercised less since the pandemic began. STARTED Question 6. This soup smells good. HAS

` 1. ` In future cities, solar panels on rooftops should power skyscrapers.

` -> ` should + V-inf: nên làm gì

` = ` It is necessary that ...

` 2. ` You shouldn't live in this mega city because it is noisy and polluted.

` -> ` shouldn't + V-inf: không nên làm gì

` = ` It's not good for you to V

` -> ` Clause`1` + because + Clause`2`: MĐ lí do

` 3. ` People have moved from the city since a lack of housing affordability started in 2020.

` -> ` HTHT + since + QKĐ

` 4. ` A few decades ago, new advancements in technology started to widen the gap between children and adults.

` -> ` For the past decades (HTHT) ` => ` A few decades ago (QKĐ

` 5. ` Many people have exercised less since the pandemic started.

` -> ` HTHT + since + QKĐ

` 6. ` This soup has a good smell.

` -> ` have/has sth: có thứ gì

` -> ` a / an / the + adj + N