My son __________ his clock  when I went to get a cup I __________ in his study.
#103412
A
was winding up; had left
B
would up; had forgotten
C
had wounded; left
D
was winding up; forgot
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After Jack had sent some e-mails, he _______ working on his project.
#102159
A
had started
B
has started
C
started
D
starts
  When I ______home, I caught a thief stealing from a passer-by.
#99768
A
headed
B
was heading
C
has headed
D
had headed