ответ
1 A student is being asked here, Isn`t he?
7 Children play chess. don`t they?
13 His father was a doctor, wasn`t he?
14 He has been working hard. hasn`t he?
15 He has got a bicycle, hasn`t he?
16 Dogs can swim well, can`t they?
17 My mum is working in the shop, isn`t she?
18 Children like reading fairy tales, don`t they?
19 They were glad to see him, weren`t they?
20 Dad had spoken on the phone, hadn`t he?
21 We won`t wait for you, will we?
22 All sweets are very tasty, aren`t they?
23 He has bought a new car, hasn`t he?
Объяснение: