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1.Didn't Bob read this book last summer?

2.Hasn't Ann made a good dress for her party?

3.Hadn't Helen played with her sister by 3 o'clock?

4.Were the children sleeping when it began to rain?

Объяснение:

“Bob did not read this book last summer”.

"Did Bob read this book last summer?

Did make a good dress for her party

make a good dress for her party?

Helen had not played with her sister by 3 o’clock

"Had Helen played with her sister by 3 o’clock?

The kids did were awake when the rainy downpour started

Were the kids awake when the rainy downpour started?

Объяснение: