When the old man ______ to walk back to his house, the sun ______ itself behind the mountain. 
#100109
A
started; had already hidden
B
was starting; hid
C
had started; had already hidden
D
had started; was hiding
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  I have no idea what _____ while I was asleep.
#100185
A
has happened
B
could happen
C
had happened
D
happened
—Do you know when Jim's coming?—He _____ 9:00 a.m.
#100535
A
had said
B
says
C
has said
D
said