Rearrange the words or phrases to make complete sentences

Ai giải giúp em bài này đi ạ
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IV/ Rearrange the words or phrases to make complete sentences.
1. time/ did/ something/ international organizations/ decrease/ governments/ It/ to help/ and/ is/ the
world population.
2. We/ population growth/ limited./ our resources/ must/ limit/ are/ because
3. Many people/ of/ aware/ the/ overpopulation./ are/ of/ the problems/ not
4. behave/ them./ badly/ Some children/ and/ control/ can't/ their parents
5. Last Saturday/ of/ took part/ by/ our English teachers./ the representatives of three classes/ in/
organized/ my school/ the annual final English Competiti on