While having our dinner, _______. 
#68160
A
the door bell rang
B
our newspapers came to the door
C
we heard the door bell ringing
D
the postman brought several letters to us
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Lisa, could you tell me ________ yesterday?
#70303
A
what did the teacher say
B
what the teacher said
C
what will the teacher say
D
what the teacher will say
We don't know ___ to pay a visit to the old town.
#73538
A
whether
B
if
C
that
D
which