Read and listen to the article. For each question, mark the correct letter A, B, C or D. (Đọc và nghe bài báo. Với mỗi câu hỏi, chọn A, B, C or D.) What is the writer doing in this text?A. Describing a summer school he started in 2005.B. Explaining how to send a child to Tinkering.C. Talking about the US school system.D. Talking about G. Tulley’s programmes for kids.