The success of the program to eradicate smallpox has stimulated experts to pursue what they had not previously considered possible--better control, if not eradication, of the other infections such as measles and yaws.
-
Awhat they had not previously considered possible--better control, if not eradication, of the other infections such as
分析该选项
-
Bwhat they had not previously considered a possibility--better control, if not eradication, of such infections like
分析该选项
-
Csomething they had not previously considered possible-better control, if not eradication, of such infections as
分析该选项
-
Dsomething not considered a previous possibility--better control and perhaps eradication, of other infections such as
分析该选项
-
Ethe possibility of what they had not previously considered--better control and possibly eradication of infections like
分析该选项