【答案】

4. D 5. B

【原文】

（4）Danish special forces, serving as part of Nato's counter-piracy operation freed the crew of cargo ship boarded by pirates off Somalia.（丹麦特种部队，是反海盗组织Nato的一部分，解救了被索马里海盗挟持的货船船员。）They moved in after being assured by the captain that the crew had locked themselves in a safe room, a Nato spokeswoman told the BBC.
（5）It seems the pirates escaped to their boat before the troops arrived （海盗在军队到达之前就逃离了这艘货船。）but the l80m（590ft）vessel was being searched.
A second pirate boat in the area was seized by a Russian warship, Nato says.