1.) Correct misplaced modifier in this sentence.
After learning to sit and roll over, Walter entered his puppy in a local dog show.

2.) Correct the mistake in this sentence:
No one was happier than Alex to discover his missing wallet mowing the lawn.

3.) Correct this sentence:
Everyone warned the child not to get to close to the dog in the house that snarled all the time.

4.)Correct this sentence:
Driving down the winding road, getting car-sick is common.