每日普通话 Daily Mandarin Chinese: A：I'd like to help pitch in with dinner. 我想帮忙做晚饭。Wǒ xiǎng bāng máng zuò wǎn fàn。 
B：Really? You are joking? 真的？你开玩笑吗？Zhēn de? Nǐ kāi wán xiào ma? www.e-Putonghua.com