la
二组跟咱们挑战啦！
èr zǔ gēn zánmen tiǎozhàn la!
Group Two is challenging us!
他真来啦？另见770页lā。
Tā zhēn lái la? Lìng jiàn 770 yè lā.
He really came? See also page 770 for 'lā'.