Đề luyện tập IELTS Writing Task 2

Some people claim that there are different ways of saving energy (electricity and gas), such as using energy for a shorter period of time in the workplace and not using electricity / gas once a week. Do you agree or disagree with this statement? Would it be an effective measure to save energy? Give your own opinion.

Some governments try to control the way a national language is used. For example, they may restrict the introduction of foreign words, or the use of dialects, or they may demand that a certain language be used in schools. What are the benefits and disadvantages of these policies? Do you think they can ever be effective?