Barrack Obama __________ President of the United States since 2010.
#63757
A
became a
B
has become a
C
has turned
D
has been
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They ______Hong Kong twice.  
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A
have gone to
B
have been to
C
have been in
D
have gone in
He complained that this was the third time he            of the changes of the meeting date.
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A
would be informed
B
was informed
C
has been informed
D
has been informed
—Why,Jack,you look so tired!—Well,I ________ the house and I must finish the work tomorrow.
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A
was painting
B
will be painting
C
have painted
D
have been painting
I got caught in the rain and my suit _______.
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A
has ruined
B
had ruined
C
has been ruined
D
had been ruined