1 was made completely from cotton in the 18th century
2 is grown in tropical countries
3 will be produced in France next year
4 has just been introduced in the USA
5 have been built this year
Bài 2
1 The problem can be solved
2 Experiments on animals should be stop
3 Life on another planet might be found
4 All the schools in the city have to be improved
5 A new bridge is going to be built in this area
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