Can you help me complete these sentences?

Question

I need to complete these sentences with ONE word and one word only. I cannot change the way the sentences are phrased, so please don't modify them.
The words I completed them with are written in caps. I know they are not suitable, so could you point out if they're incorrect and suggest some other words to use? But remember, I can't modify the sentences, just complete them with a word.

1. I turned the volume down in order SO I wouldn't annoy them.

2. She went to her parents so THAT she could help me.

3. We walked quietly so as NOT to disturb the audience.

4. I go to bed early in ORDER not to be tired.

5. I walked faster so AS to catch the train.

Answer 1

Except for the "that " in #1 that others have pointed out, you're fine. You may want to know, however, that while "so as" is correct, it really isn't used very often. To express the meaning in #5, you'd more likely say "I walked faster in order to catch the train" or "... so I could catch the train".

Answer 2

Try THAT for sentence 1. The others seem ok to me.

Answer 3

1. that (or in order not to annoy them)
The rest are correct.

Answer 4

1) but
the rest are correct, the first one also needs some changes but you said the sentences cannot be modified.