Mandarin class HK-Can you help me?

   ♦A:今天早上你能帮我代班两个小时吗? Jīntiān zǎoshang nǐ néng bāng wǒ dài bān liǎng gè xiǎoshí ma? Could you please cover for me two hours this morning? ♦B:可以。有什么具体的原因吗?万一有人问起来我好告诉他们。…