Câu trả lời:

1. had been
2. haven't met

Câu trả lời:

the tich hinh hop chu nhat do la :

6*4*3=72 dm³

the tich hinh lap phuong la :

5*5*5=5³=125cm³=0.125dm³

^{so hinh lap phuong xep day cai thung la :}

^{72/0.125=576 hinh lap phuong}

^{DS 576 hinh}