Read and learn.

A. Fill in the blanks.
1. We, human beings, cannot live alone as we are __________.
2. As people developed different occupations, they began to __________ upon one another for their __________.
3. __________ go hand in hand.
4. By cooperating with one another, work gets done.
5. The headquarters of the UNO are located in __________.

B. Complete the following sentences.
1. A community is defined as __________.