问题
选择题
As soon as the crew(船员) were attacked, the police______ to look into the matter.
A．set down
B．set out
C．set about
D．set up
答案
B
题目分析：考查短语辨析。Set down写下，记下；set out to do sth开始做某事；set about doing sth开始做某事；set up建立，设立，成立；句意：船员们一被攻击，警察就开始调查这起案件。因为横线后面是to look…，说明B正确。