may' thang`lanh dao. Vn hien nay, cho chung' no' thi toan, ly' hoa' lop' 5, toan`dan giam' sat', xem thu* co' thang`nao`dau. kg?
that. du* thua`, khi len ban`thi, lam`sao ma`dâu., chung' no' gan`cau`tieu xa truong`hoc., an cuc', an thit. cho' thi`chung' no' la`so' 1