1 He study English as hard as me/ I .
2 I ran/ run faster than he .
3 His English is much better than mine.
4 He ran faster and faster.
5 Shanghai is one of the most beautiful cities in China.
6 I am taller than any other student in my class.
7 The factory was built last year.
8 Must the work be finished at once?
9 Our classroom has already been cleaned by us .
10 He was asked a question by his teacher.
11 These books can't be sold .
12 The old are being looked after carefully .