1) had been working, left
2) clears, will walk
3)had been reading
4)May
5)was to
6)have you been getting
7)are always complaining
8)was crossing, struck
9)graduated, began
10)are, will stop
11)must
12)should
13)didn’t have
14)can’t be solved
15)five
D, in the follow up letter you should always thank the interviewer.
They don't want anyone who is annoyingly persistent or seemingly desperate..
