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Hello.
Do you see a flaw in these sentences in terms of grammar and semantics?

There won't be any picnic today.
He must have bought the ticket already.
I live at 70 Oak Street.
Stay on the train until Berlin and then change.
He's jogging along the stream.
Are you going to pay by card or cash?
I like travelling on planes.
We thought she was arrogant, whereas in fact, she was shy.
She left her husband and lived with her boss instead.
She give classes in history.
She was isolated as a result of her family's wealth.

Also,
do you say: on line or online?
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Regarding online, if you mean "on the Internet," then online.

If you mean a queue, then Americans wait on line or in line, with colloquial variation as to whether it's "in" or "on."
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Hi,

She left her husband and went to live with her boss instead. OK

Clive
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Comments  
Latin,

There won't be any picnic today. Ok
He must have bought the ticket already. OK
I live at 70 Oak Street. OK
Stay on the train until it gets to Berlin and then change.
He's jogging along the stream. OK
Are you going to pay by card or cash? OK
I like [to travel] / travelling on planes.
We thought she was arrogant.(period) whereas In fact, she was shy.
She left her husband and lived with her boss instead. OK
She give(s) classes in history.
She was isolated as a result of her family's wealth. um.......I think I get the meaning. But the word " isolated" has me wondered.
 BarbaraPA's reply was promoted to an answer.
GoodmanShe left her husband and lived with her boss instead. OK

Would this sentence be better?

She left her husband and went to live with her boss instead.
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 Clive's reply was promoted to an answer.