TỠM SỐ TỰ NHIỜN N SAO CHOA) (N + 13) ⋮ (N – 5) (VỚI N < 5)...

3, Grammar:- The present simple and the present continuous./ The present coutinuous for future- There is/ There are- Prepositions of place- Verbs be and have for description- Comparative adjectives: smaller, more expensive….- Superlative of short adjectives: longest, hottest…- Modal verb: must/ should- Should & shouldn’t for advice- Will/ won’t to talk about intentions