在括号中选择最佳答案写在横线上。;p,r9{*r']9A4o5s(h/c-Z:R'Q:X1i3X
5f-j:^;f*K(U7s5n （On, In） the 4th , I did my homework.;p,r9{*r']9A4o5s(h/c-Z:R'Q:X1i3X