Câu trả lời:
1. They swim very well, so do their pradents
2 She has a beautiful voice
3 He rus very fast and and so does Liz
4 They have sung for an hour
5 Neither he nor I have read an novel by Charles
6 The little girl has never watched such an interesting programme
7 The boss last gave us a day-off a year ago
8 I spends half an hour walking to school every
9 She used to study excellently
10 He started working here when she was 18 years
11 They like eating ice-creams and so do we