I don't know what kind of pet _____(get) Caochong _____ (weight) an elephant in a clever way.

I don't know what kind of pet _____(get) Caochong _____ (weight) an elephant in a clever way.
I don't know what kind of pet _____(get) Caochong _____ (weight) an elephant in a clever way.

I don't know what kind of pet _____(get) Caochong _____ (weight) an elephant in a clever way.
to get：句型:不知道该做什么：don't know what to do
weight：称重,曹冲用了一种聪明的办法测量了大象的质量.