The committee __ over the problem among themselves for two hours. 
#100019
A
has argued
B
has been arguing
C
have argued
D
have been arguing
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Mr.Wang ______ two boys to send the sick boy to the nearest hospital.
#104349
A
arranged
B
has arranged
C
had arranged for
D
has arranged for
Many British people have noticed that butterflies _______ from its natural habitats during the past several years.
#102940
A
are disappearing
B
have been disappeared
C
have been disappearing
D
will have disappeared