Before he started work , I asked the builder to give me a (n) _____ of the cost of the museum.

A．estimate

B．value

C．announcement

D．evaluation

某天，小刚在放学回家路上被两个持刀歹徒劫持。此时，与小刚同行的小军等4人应该[ ]

①赶快回家，以免受到伤害

②抓住机会实施正当防卫

③同歹徒拼命，力争夺回小刚

④记住歹徒相貌，了解歹徒去向，及时拨打“110”

A．①④

B．②③

C．③④

D．②④