对不起 ！    没关系 。    对不起 ， 我 迟到 了 。    对不起 ， 让 您 久等 了 。     I'm sorry.
It doesn't matter.
I'm sorry. I'm late.
I'm sorry. I kept you waiting for a long time.

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Sorry!
Never mind.
Sorry,I'm late.
I'm sorry to have kept you waiting. Lesson Content: Sorry!
Never mind.
Sorry,I'm late.
I'm sorry to have kept you waiting.

• waiting [´weitiŋ]   n.等候；伺候   (初中英语单词)
• summary [´sʌməri]   a.&n.摘要(的)   (英语四级单词)