在英语二的七选五题型中，答案通常隐藏在上下文的线索中。以下是一段模拟的七选五文本及其答案：
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Text:
1. In recent years, the popularity of online education has soared, offering convenience and flexibility for students worldwide.
2. However, with this surge in online learning, several challenges have emerged, notably the issue of academic integrity.
3. One of the most significant concerns is the potential for cheating, as students can easily access resources and submit work without proper supervision.
4. To address this problem, some institutions have implemented advanced technologies like proctoring software to monitor students during exams.
5. Another challenge is the quality of online instruction, which can vary widely depending on the expertise of the instructor.
6. Moreover, the lack of face-to-face interaction can lead to feelings of isolation and decreased motivation among students.
7. To mitigate these issues, educators are exploring innovative teaching methods and interactive tools to enhance the online learning experience.
8. Despite these challenges, the benefits of online education are undeniable, and it is likely to continue growing in the future.
Questions:
1. What is the main issue discussed in paragraph 2?
2. What technology is mentioned in paragraph 4?
3. What is a potential problem mentioned in paragraph 5?
4. What feeling is mentioned in paragraph 6?
5. What is the author's overall view of online education in paragraph 8?
Answer Key:
1. Academic integrity
2. Proctoring software
3. Quality of online instruction
4. Isolation
5. The benefits are undeniable, and it is likely to grow
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