单选题
The doctor in Singapore performed a valuable service by ______.
A、
finding the subgroup of the virus
B、
developing a cure
C、
keeping his patients apart from others
D、
reporting the outbreak to W. H. O.
【正确答案】
D
【答案解析】
解析：由第二段第四句话Then he reported the outbreak to the World Health Organization in Geneva可知。
提交答案
关闭