I have answered "aku akan membuka kota saya". But it turned out wrong. In fact "saya" and "aku" have same meaning.
That sounds really weird because you use "saya" and "aku" in the same sentence. It should be either all "saya" or all "aku":
alright! thanks anyway.
Saya akan membuka 'boks' saya harusnya betul karena boks sudah masuk ke dalam kbbi.