问题补充：
The Chinese government has been in close contact with the authorities of HKSAR in dealing with the accident more than thirty people were killed .
A. where
B. when
C. which
D. why
答案：
(答案→)A. where
B. when
C. which
D. why
解析：句意：中国政府就处理30多人遇难的事故，与香港特别行政区当局在密切接触。more than thirty people were killed. 修饰先行词accident.把先行词还原到从句中为：More than thirty people were killed in the accident.可知，现行词accident作为抽象地点。关系词where还可换为：in which.故A正确。
