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

Question 1: In future cities, solar panels on rooftops should be used to power skyscrapers

 -> It is necessary = should

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

 -> It's not good for sb = shouldn't

Question 3: A lack of housing affordability has made people move from the city since 2020

 -> started + mốc thời gian (QKD) = since + mốc thời gian (HTHT)

Question 4: New advancements in technology started widening the gap between children and adults a few decades ago

  -> for + khoảng thời gian (HTHT) = khoảng thời gian + ago (QKD)

Question 5: Many people started to exercise less at the time the pandemic began.

  -> since + mốc thời gian (HTHT) = started + mốc thời gian (QKD)

Question 6: This soup has a good smell