Living things are dying out quickly. First, we should ask ________ destroying them in the past years.
A． what part people have been playing
B．what part have people played in
C.what part people have played in
D．people have been played what part
Living things are dying out quickly. First, we should ask ________ destroying them in the past years.
A． what part people have been playing
B．what part have people played in
C.what part people have played in
D．people have been played what part
C