1 . Online learning is a term used to describe distance or correspondence courses that are offered over the Internet.     1    

There are two types of online course access: open and restricted. Open access allows virtually anyone with an Internet browser to view the course material.     2     This initiative removes the barriers to advanced knowledge and allows anyone with the interest to learn. The other type of online courses are restricted access courses, which limit the class to registered students. These courses offer instructor interaction and require grades upon completion.

It is more efficient for both sides to access course materials online.     3     The recurring cost is for marking and moderating the class communications. This greatly reduced the staff time and costs. Online courses also allow students to complete coursework from a wide range of locations and remove the time restriction to access course lectures.

The material for online courses provided by educational institutions has been carefully reviewed and approved before the course is offered. Many introduction and intermediate courses do not change.     4     Due to the reduced expenses for online courses, the fees are sometimes lower than a standard instructor-led course. Additional savings like transportation make online learning the most cost-effective learning method available.

    5     These tools include mobile audio and video viewers, improved online interactive tests, and tool and course management software. The continued development in this area will further enhance the quality of online courses and encourage more people to further their education.

A．As a result, the courses are stable.

B．Students are required to use effective study skills.

C．The fees are much lower so that most students can afford it.

D．Technology continues to expand to meet the needs of online students.

E．This type of online learning does not require interaction with an instructor.

F．From the educator perspective, the course lectures can be recorded once and reused.

G．It is prized as a cost-effective method of providing access to education for a large population.

2 . Online courses offer people abundant opportunities to learn. Try some of the Harvard online courses about humanities.

The Path to Happiness

From Confucianism to Daoism, the philosophies developed over two thousand years ago are among the most powerful in human history. This course brings voices from the past into modern contexts to explore the path to a good life today.

Duration: June 16, 2021—June 14, 2022

Fees: Free of charge

Pace: Self-paced

Difficulty: Introductory

Introduction to the Ancient Greek World

This course is about ancient Greece with its unique places, ways of life and historical changes. We survey the most important social institutions and cultural traditions. We also study everyday features such as food and dress.

Duration: June 21—August 6, 2021

Fees: $3400

Pace: Instructor-led

Difficulty: Introductory

Biotechnology and the Human Good

Biotechnology offers exciting and promising prospects for healing the sick and relieving the suffering. In this course we consider possible functions beyond common treatments like making people look younger, perform better and become perfect.

Duration: June 21—August 6, 2021

Fees: $ 3400

Pace: Instructor-led

Difficulty: Intermediate

Superheroes and Power

What makes superheroes popular? How can they help us think about super powers? In this course, we explore those questions in Marvel and DC favorites (especially the X-Men) as well as independent comics novels.

Duration: June 22 —August 6, 2021

Fees: $ 3400

Pace: Instructor-led

Difficulty: Intermediate

1. Which course can you take if you are free in Oct. 2021?

A．The Path to Happiness	B．Introduction to the Ancient Greek World
C．Biotechnology and the Human Good	D．Superheroes and Power

2. What does Biotechnology and the Human Good deal with?

A．Powers of superheroes.	B．More uses of biotech.
C．Ways to increase happiness.	D．Clinical practices of biotech.

3. What do the four courses have in common?

A．They are of the same level.	B．They are free of charge.
C．They belong to the same subject.	D．They are instructor-led.