As he grows older, he becomes increasingly intelligent

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As he grows older, he becomes increasingly intelligent.

The older he grows, the more intelligent he becomes.

The older he grew, the more intelligent he becomes.

The oldest he grows, the more intelligent he becomes.

The older he grows, more intelligent he becomes.

Giải thích

Chọn đáp án A

Cấu trúc so sánh kép
Loại B vì "grew" chia sai thì
Loại C vì "oldest: sai dạng so sánh của tính từ
Loại D vì thiếu "the"
Đáp án đúng là A.