The（ ）that occurred in London in 1952 left 4,000 people dead or dying.
A、storm
B、hurricane
C、smog
D、earthquake
【正确答案】：C
【题目解析】：In 1952 the sulphur dioxide in the four-day London smog, an unhealthy atmosphere formed by mixing smoke and dirt with fog, left 4,000 people dead or dying.
