Change to the plural as in the example e.g. That is

Change to the plural as in the example
e.g. That is an ox.Those are oxen
1.I am a student......
2.She is a woman......
3.This is a goose.........
4.He is a policeman........
5.That is a big monkey ......
6.It is a guitar ...........
7.It is a nice baby ...
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