1 - Use while or when:
a) I was relieved when James finally arrived.
b) I felt very uncomfortable, ____________ I heard her story.
c) They were doing nothing, ____________ I was working.
d) I was sad ____________ you forgot my birthday.
e) Carlos had many problems ____________ he was a teenager.
f) I did Josie’s homework, ____________ she was sleeping.
g) Kenya scowled ____________ I mentioned John.
h) Someone stole my bag ____________ I got out of the cab.
i) I hurt my back ____________ I lifted the piano.
j) I thought about her ____________ I was on my way home.
k) I broke my leg ____________ we fell.