Charities rely on________contributions. ( volunteer ); We should save________resources. ( nature ); They collected over 1000____For the petition ( sign )

 1. Charities rely on________contributions. ( volunteer).
 2. We should save________resources . ( nature ).
 3. They collected over 1000____For the petition ( sign ).
 4. My heart was filled with the_____of the first school day ( excite ).