Make the statements more polite.
Example: You`re not right.(think) - I don`t think (that) you`re right.
1. It wasn`t an explosion. (think)
2. They weren`t humans. (believe)
3. James hasn`t got an alibi. (think)
|4. Scientists can`t explain their disappearance. (believe)

1. I dont think that was an explosion.
2. I dont believe they were humans
3. I dont think James has got an alibi
4. I dont believe they can explain their disappearance.

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