Part I Vocabulary and Structure (20 points)Directions: Fill in the blanks in the following passage by selecting suitable words from the Word Bank. You may not use any of the words more than once. Fill the blanks only with the letters (A-O).The Internet has made English learning much easier. English learners used to be ______ to spend their time in libraries looking for the books that would help them in their language studies. It was very inconvenient because a lot of materials could only be found in ______ and uninteresting textbooks and readers. But today ______ content on a variety or subjects is only a click away. This is especially ______ for those who wants to learn English earnestly.A tedious B obliged C beneficial D authentic