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	11/09 13:08:21
	Tiếng Anh - Lớp 9 \| Tiếng Anh \| Lớp 9

I regret not studying hard at school. (only) → If _{…………………………………………………………………} hard at school.

I regret not studying hard at school. (only)

→ If _{…………………………………………………………………} hard at school.