1.A film which appeals to the audience can arouse their interest from the very beginning.
2.The workers of this nature reserve try to clean it by themselves but their efforts are not enough.
3.She regained consciousness last night, but there is still a long way to go before she plays tennis again.
4.A school excursion is a good chance for children to learn a great deal about their own country.
5.Many Chinese-Americans are playing such an important role in the American economy that in some fields nobody can substitute for them/ there is no substitute for them.