下列各句中，没有语病的一项是（ ）

It was the drug，not the disease，that killed the boy.——He would be still alive today if he ________ that drug.

I won’t give in ________ great difficulties I come across in my life.

Peter’s father is a _______ math teacher.—I think so. He teaches _______.

It is said that our body _______ 206 bones; if one of _____ is broken, it will cause inconvenience of some kind. [ ]