-----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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 If their marketing plans succeed,they ________ their sales by 20 percent.
#99749
A
will increase
B
have been increasing
C
have increased
D
would be increasing
I didn’t get into the two-hour quarrel; I know how it ______, though.
#104076
A
would break out
B
has broken out
C
was breaking out
D
had broken out