-----They used to be good friends, but now they are like strangers. ----- How _____ this ______?
#104151
A
were; come about
B
did; come about
C
were; taken place
D
were; happened
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— Flight MU257 ______, I must be off now.— Have a nice trip.
#102791
A
is being announced
B
has announced
C
was announcing
D
had been announced.
He must have done it well, because he told me he just did what he _____ to do. 
#101080
A
has been told
B
had been told
C
was told
D
had told