Here are the answers to the questions:

1. **C. cleaned** - This has a different vowel sound compared to the others.
2. **B. cottage** - This has a different vowel sound compared to the others.

For the stress-related question:
3. **D. rubbish** - This has a different stress pattern compared to the others.

For the questions following "Playing sport is good for our...":
5. **D. health** - This is the correct word to complete the sentence.

And for the last question about jogging:
6. The sentence likely needs "goes" to read "He usually goes jogging for half an hour before breakfast."

Feel free to ask if you need further clarification!