A．To invest more on American Indians' health care.
B．To provide free health care to American Indians.
C．To accept more Indian students majoring in medicine.
D．To carry out more studies on American Indians' health care.
A．Weather extremes are outcomes of global warming.
B．Weather extremes are not caused by global warming.
C．Weather extremes are not directly related to global warming.
D．Weather extremes will be worsened by global warming.
A．The temperature began to increase much faster.
B．Europeans experienced extreme hot weather.
C．Hot weather became more frequent all over the world.
D．Global warming produced heat wave in many countries.