Choose the correct option
Past Simple and Past Perfect

1. I
   [was|had been] speechless as I
   [didn't see|hadn't seen] anything like this before.
2. Charles
   [didn't go|hadn't gone] to the cinema with us yesterday because he
   [already saw|'d already seen] that movie.
3. I
   [was|had been] to that camp three times before they
   [closed|had closed] it.
4. The show
   [already started|had already started] when we
   [arrived|had arrived] so they
   [didn't let|hadn't let] us in.
5. I
   [knew|had known] exactly what to do because I
   [did|had done] it many times.
6. I
   [came|had come] home and
   [went|had gone] straight to bed. I was exhausted.