GMAT
The success of the program to eradicate smallpox has stimulated experts to pursue something not considered a previous possibility--better control and perhaps eradication, of other infections such as measles and yaws.
The success of the program to eradicate smallpox has stimulated experts to pursue something they had not previously considered possible-better control, if not eradication, of such infections as measles and yaws.
题目基本信息