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It is important that cancer is diagnosed and treated as early as possible in order to assure a successful cure.

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It is important that cancer is diagnosed and treated as early as possible in order to assure a successful cure.

is diagnosed

treated

as early as possible

to assure

Giải thích

Chọn đáp án Ais diagnosed => be diagnosed
Cấu trúc câu giả định: It + be + adj (important/ essential ..) + that + S + Vinf + O.