The rule about subjects joined by 'and' is that there must be a subject-verb agreement. This means that if the subject is singular, then the verb must be also singular. On the other hand, if the subject is plural that means the verb must also be plural.
No idea how to answer that question sorry
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This is not surprising because there are about 100 billion stars in our galaxy.
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D
I think I'm not Shure have a good day:,-)
