$\text{@Ochi}$
`1`, You have/need to do this exercise.
→ have to + V: phải làm gì / need to + V: cần làm gì
`2`, Nguyen Trai School is the biggest school in the town
→ so sánh nhất: S + tobe + the adj-est/the most adj + ...
`3`, You shouldn't eat lots of sweets
→ S + should (not) + V + ...: Ai đó nên (không nên) làm gì
`4`, Could you show me the way to the City’s Exhibition, (please)?
→ tell S how to get to ... = show S the way to ... : cho ai đó biết hướng để đi đâu
`5`, Are you good at painting picture?
→ good/bad at + V-ing: giỏi/kém về cái gì
$\text{#BTS}$