He is not native, if he were, we _______ this discussion over his identity.
#87893
A
would not be having
B
are not having
C
had not had
D
will not have
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“I know she was in because I heard her radio, but she didn’t open the door.” “She___the bell.” 
#88102
A
may not be hearing
B
may not have heard
C
must not have heard
D
must not be hearing
 It’s too bad that I failed in the math exam. If only I ______ hard at it!
#87203
A
worked
B
had worked
C
has worked
D
would work