His mother ________ (read) books at 10 a.m last week

1. His mother ________ (read) books at 10 a. m. last week.
2. Their teacher, together with others, _______ (go) with them to ensure their safety.
3. To be seated in a peaceful place _________ (be) one of my hobbies.
4. How she lives _________ (be) none of my business. 
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