The athlete fell off his bike when he _____ down the hill. 
#100360
A
cycled
B
was cycling
C
had cycled
D
is cycling
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 When I ________ home, I caught a thief stealing from a passer­by.
#99477
A
headed
B
was heading
C
has headed
D
had headed
Mr. Lin _____ when I go to see him on Sundays. 
#100147
A
is always working
B
was always working
C
always worked
D
has always worked
 I was very busy that day. Otherwise I _________in the discussion.
#103078
A
would take party
B
had taken part
C
took part
D
would have taken part