Some scientists look into outer space while others look elsewhere. Georg Steinhauser looked into his bellybutton and discovered what the lint found there contains and its possible purpose. Mostly made of fabric bits and dead skin, it is most likely used to keep germs and other things out.
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Answer:
1) are sitting ; having ; watching
2) is reading ; is washing ; is watching ; am doing
3) are swimming ; is reading ; is drinking
4) is driving ; is talking
5) are sleeping ; am watching
6) are going
7) is helping ; are preparing
8) is wearing
9) am trying
10) is brushing
11) is planting
12) are climbing ; are having
13) am doing
Explanation:
singular ( 1 ) - is
plural ( > 1 ) - are
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