1. Mua o? cai ong ban auto HB ( Bat quai lao nhan). luc 2 nguoi` ms quen nhau la cap 10, tang den khi nao` len dc cap 4 thi` cuoi' dc, moi~ ngay` tang. 5 lan` la` het tang muc' do. tinh` cam?. Sau 5 lan` tang. tiep' no' chi? tang thuoc. tinh' .
2. Mua 2 cai AC nam va` nu~ trong shop, 600@ 1c, 2...