Question

The incident _____ a chain of events which resulted in the outbreak of the World War I.

A. set out	B. set off
C .set about	D. set in

Answer 1

B

考查短语辨析，set out出发，set off动身，引起，爆发，set about着手工作，set in开始，到来，句意：这件事引起了一连串的事件，导致了第一次世界大战的爆发。所以选B。