These sentences all have a missing word that is difficult to spell.
Listen and complete the gaps.

I’m worried I might have pulled a muscle or strained a cord in my neck.
The blood test confirmed I have hepatitis B.
The nurse administered the vaccine via an injection.
It’s a minor cut, but I’ll still keep it clean to avoid infection.
I’m learning to walk again with my new leg prosthesis.
Don’t stretch too much or you could tear a ligament.
The doctor inserted the needle into the vein for the blood test.
My joints have been cracking a lot, especially when I move after sitting.
Check