On the desk of Peter McDermott was a fresh pile of mail and memos. Dr Bell was famous for his keen powers of observation

1. On the desk of Peter McDermott was a fresh pile of mail and memos, was not it?

Was a fresh pile of mail and memos on the desk of Peter McDermott?

What was on the desk of Peter McDermott?

Where was a fresh pile of mail and memos?

Was a fresh pile of mail and memos on the desk or on the sofa of Peter McDermott?

1. Dr Bell was famous for his keen powers of observation and deduction, was not he?

 Was Dr Bell famous for his keen powers of observation and deduction?

Who was famous for his keen powers of observation and deduction?

What was Dr Bell famous for?

 Was Dr Bell or Mr. Smith famous for his keen powers of observation and deduction?

1. He thought to himself about the probable trading value of such a coat, did not he?

Did he think to himself about the probable trading value of such a coat?

Who thought to himself about the probable trading value of such a coat?

What did he think to himself?

Did he or did she think to himself about the probable trading value of such a coat?

1. There was a huge tree, seeming to sleep in the fading moonlight, was not there?

Was there a huge tree, seeming to sleep in the fading moonlight?

What was there?

Was there a huge tree or a small tree, seeming to sleep in the fading moonlight?

1. He and girls ate supper, then moved to some seats in the bay window, did not they?

Did he and girls eat supper, then moved to some seats in the bay window?

Who ate supper, then moved to some seats in the bay window?  

Did he and girls eat supper or dinner, then moved to some seats in the bay window?

What did the he and girls eat, then moved to some seats in the bay window?