513.What did you do last Sunday,Peter?
Well,I ______ to see a friend of mine,but in the end I stayed at home doing nothing.
A.was going
B.has gone
C.went
D.had gone
514.I seem to have too much trouble with my new work,sir.
I don't think so.You ____ very well.
A.are doing
B.will do
C.will be doing
D.had done