MAI'S FAMILY ARE GOING TO STAY IN HANOI___ TWO DAYS.(IN/ON/AT/FOR...

353. - 500 CAU TRAC NGHIEM TIENG ANH 6 7
500 CAU TRAC NGHIEM TIENG ANH 6 7

353. Mai's family are going to stay in HaNoi___ two days.(in/on/at/for).