Answer:
A)My friend ...fell..... off the ladder while he ...was painting...... the ceiling of his room ( FALL,PAINT)
B) We ....bought.... the house in 2003 . at that time it ....was costing..... $ 150,000 ( BUY,COST)
C) Dad ......wasn't....... interested in buying a new car ( NOT BE)
D) My sister ...was waiting.. for me at airport terminal when I .....arrived..... ( WAIT , ARRIVE)
I think the answer is A because second person is what manuals and directions are written it, but I could be wrong.
B.-credibility i might be wrong
