The didn't flow to Athens last week. Did they flow to Athens last week?
Our teacher did not tell us about animals at the last lesson. Did our teacher tell us about animals at the last lesson?
The children were not at zoo last Sunday. Were the children at zoo last Sunday?
I didn't meet him many years ago. Did I meet him many years ago?
You didn't speak to her yesterday. Did you speak to her yesterday?
We were not very tired yesterday. Were we very tired yesterday?
Henry didn't buy this bike a year ago. Did Henry buy this bike a year ago?
Our lesson didn't begin fifteen minutes ago. Did our lesson begin fifteen minutes ago?
Helen didn't forget about the meeting. Did Helen forget about the meeting?
We didn't see the UFO in the sky. Did we see the UFO in the sky?
Объяснение:
ch3
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сh3 - сh2 - с- сhoh- сh3
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ch3