Ladies and gentlemen, please fasten your seat belts.The plane __________. 
#101135
A
takes off
B
has taken off
C
is taking off
D
took off
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Her sister left home in1998, and       since.
#101660
A
had not been heard of
B
has not been heard of
C
had not heard of
D
has been heard of
I’m calling about the apartment you      the other day. Could you tell me more about it?
#100603
A
advertised
B
had advertised
C
are advertising
D
will advertise