—Your colleague is speaking English with fluency.—It's no wonder.She ____ in the UK for a year as a visiting professor
#100404
A
worked
B
has worked
C
had worked
D
has been working
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—Jack, did you see my son Harry just now?—No,Mrs. White. I _______computer games.
#100869
A
have played
B
am playing
C
had played
D
was playing
 --Have the police found the parents of the baby found by the road? ---Not yet. His identity ______. 
#102907
A
would be found out
B
has been found out
C
is being found out
D
had been found out