let's cut the birthday cake _a bread knife.A by B with C over D on

let's cut the birthday cake _a bread knife.A by B with C over D on

B
让我们用一把刀来切开生日蛋糕吧.

let's cut the birthday cake _a bread knife. A by B with C over D on
选B
翻译
让我们用一把面包刀来切蛋糕吧
表示用工具，一般用with/by
而【by】多用于交通工具的使用，所以这边用with
有不会的可以再问我