Answer:
1. <u>Were allowed</u> to protest outside the factory.
2. My grandparents didn't get <u>used to </u>recycling anything at all.
3. Climate change is by far the<u> worst</u> problem the Earth faces.
4. Ricky <u>said</u> that he only uses rechargeable batteries these days.
5. It was the first time Tom had <u>ever</u> seen a panda.
5. They're tired because they <u>have been</u> planting trees all day.
Adverb phrase is 'performance played'
modified:Their
Most dictionaries divide syllables with a dot or a space. The correct answer is D, dot or space.