What happened in the beginning of friend or foe?

An abridgement of Friend or Foe by Michael Morpurgo. The story is a classic tale of secrecy and adventure set during World War Two. David Carey and his friend Tucky, two boys from London, are evacuated to a peaceful location in the Devon countryside. But the War is closer than they think.

Explanation:

1) d

2)c

3)b

4) a

5)c

6) c