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Jim was accused of misbehaviour. You don't believe the statement below at all. Invent some arguments to prove that he can't have done all those things.
Example:it was Jim who smashed the electric bulb in the school corridor.—Jim can't have done it because he left school at 4pm and the bulb was still ok by half past four.

1.it was Jim who started the argument during the Science class
2.it was Jim who covered the wall with graffiti.
3.i'm sure it was Jim who spoilt the pie with salt and pepper
4.it must be Jim who broke the tree in the inner yard