拘留所应当定期进行安全检查；其中主管或协管拘室民警每天要进行不少于（）拘室安全检查。
A.1次
B.2次
C.3次
D.4次
参考答案：A
32．They said his lack____experience could lead to a disaster and he should ask for nec- essary help．
A．of
B．in
C．for
D．To
