每日普通话 Daily Mandarin Chinese: A：Nǐ zěnme cái dào，dōu děnɡ nǐ bàntiān le！你怎么才到，都等你半天了！Why are you so late? I've been waiting for quite long. B：Bàoqiàn，lùshanɡ dǔchē，suǒyǐ lái wǎn le。抱歉，路上堵车，所以来晚了。I'm sorry. The traffic jam has wasted lots of time. http://www.e-putonghua.com/