My seven-year-old daughter has a great interest in music and _______ Piano classes twice a week over the last three years. 
#99583
A
took
B
is taking
C
had taken
D
has been taking
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What a big snake! It ________ one meter and a half in length.
#102850
A
is measured
B
is measuring
C
measures
D
will measure
Yesterday if the policeman _______earlier, the fight between the two boys would have been prevented. 
#103625
A
would have arrived
B
had arrived
C
were to arrive
D
arrived
When he looked up, he suddenly found himself       by a group of teenagers,       looked at him anxiously.
#103267
A
to be surrounded; which
B
surrounded; who
C
be surrounded; who
D
having been surrounded; which