Giúp em bài này với ạ=(

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`198` It was the least difficult exam I've ever done .

`-` So sánh kém nhất : S + V + the least + adj/adv + O ...

 `199` We stayed in the dirtiest hotel in the world .

`-` So sánh nhất tính từ ngắn : S + V + the + adj-est + N + O ...

`200` Many people believe that no sea in the world is as warm as the Red Sea .

`-` So sánh ngang bằng : S1 + be + as + adj + as + S2 .

`211` No river in the world is as long as the Nile .

`-` So sánh ngang bằng : S1 + be + as + adj + as + S2 .

`212` No ocean in the world is as deep as the Pacific .

`-` So sánh ngang bằng : S1 + be + as + adj + as + S2 .