Librarian: This is the book you are looking for. Student: ______________Đoạn văn21/45Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best completes each of the following exchanges. Librarian: This is the book you are looking for. Student: ______________ Yes, sureThat’s a great book.I couldn’t agree more.Thank you very much.Giải thíchChọn D