下列加线字读音全都相同的一组是（ ）
— I haven't got the reference book yet, but I'll have a test on the subject next month.
— Don't worry. You _______ have it by Friday.
一根圆柱形钢锭，长30厘米，管底面半径为1厘米，已知每立方厘米的钢重7.8克，这根钢管重多少克？
