1 He thinks Chinese is the most difficult language in the world
2 Shanghai is China's biggest city
3 Guangzhou is the largest manufacturing in China
4 They haven't visited their home village for 5 years
5 Nga is looking forward to meeting her again soon
6 The clock has bene repaired by Mr John
7 They used to wear jeans when they were young
8 Minh spends 2 hours doing his homework everyday