It’s reported that in the past 50 years around 80 percent of Beijing’s courtyard houses ______.
#63767
A
had wiped out
B
have wiped out 
C
have been wiped out 
D
had been wiped out
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I got caught in the rain and my suit _______.
#63795
A
has ruined
B
had ruined
C
has been ruined
D
had been ruined
They ______Hong Kong twice.  
#63785
A
have gone to
B
have been to
C
have been in
D
have gone in
 The house is dirty because it ________ since they moved out.
#63759
A
doesn't clean
B
isn't cleaned
C
hasn't cleaned
D
hasn't been cleaned