She often shares her deepest thoughts and fears with friends through QQ, as if they______   chatting in her living room. 
#87185
A
were
B
are
C
had been
D
has been
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We were delayed at the airport.Otherwise,we    here by lunch.
#86444
A
must have been
B
could be
C
should be
D
would have been
He ________ the window of our classroom yesterday because he didn’t come to school.           
#88280
A
mustn’t have broken
B
mightn’t have broken
C
shouldn’t have broken
D
couldn’t have broken