Peter arrived home and discovered what he had forgotten

Peter arrived home and discovered THAT he had forgotten
his door key.He rang the bell,but nobody came to
open the door.He rang again and WAIT.Still there
WAS no reply.He walked AROUND the house to see if he
could find AN open window,but they were all locked.
It BEGAN to rain,AND he did not know what to do.
Kite,his wife,had OBVIOUSLY gone out.He didn't know
where she had been AND when she'd return.Finally
he picked UP a stone and threy it at the kitchen
window.Just then,his wife returned ____ in a hUrry.

1, what-that
2,but-and(这个不太确定哈)
3,waiting-waited
4,were-was
5,a-an
6,was beginning-began
7,obvious-obviously
8,she`d-she`ll
9,at-to
10,returned-was returning

Peter arrived home and discovered what(that) he had forgotten
his door key.He rang the bell,but nobody( no body) came to
open the door.He rang again and waiting(waited).Still there
were...