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`Ex.1`.

`25`.If you want to stay healthy , you should exercise more regularly

`->` CĐK Loại `1` : Dùng để diễn tả hành động có thật ở Hiện tại

`-` If - clause : Thì HTĐ : S + Vs / es

`-` Main - clause : Thì TLĐ : S + will + V

`26`.Students must submit their assignments before the deadline

`->` S + must / mustn't + V-inf ( `26 , 27` )

`=>` Phải / Không được phép làm gì

`27`.You must cross the road when the traffic light is red

`->` Thì HTĐ ( ĐT Tobe ) : S + is / am / are + adj / n

`=>` He , She , It `+` is

`28`.I am thinking of moving to the city for a better job

`->` be thinking of + V-ing

`=>` Suy nghĩ / Cân nhắc việc gì

`Ex.2`.

`29`.This river has become polluted over the years

`->` become + adj 

`=>` Trở nên như nào

`30`.My brother is interested in playing volleyball after school

`->` be interested in + V-ing

`=>` Hứng thú làm gì

`31`.While Lily was walking across the road , she was almost struck by a motorbike

`->` While + S + was / were + V-ing , S + Ved / V2

`=>` Dùng để diễn tả hành động đang diễn ra thì có hành động khác xen vào

`32`.Because the room was decorated with some pictures , the room became more attractive

`->` Because + C1 + C2

`=>` Dùng để chỉ về nguyên nhân , lý do

`\text{# Diversity}`