Put the words or phrases in the correct order to make sentences. Write each sentence in the blank.

1.at/ saw/ I/ the local charity centre/ teach/ for/ Last week/ an advertisement/ finding volunteers/ to/ homeless children/ .

With the development of AI, there is lots of fun when students study with educational ___________ these days.

Community service often includes ___________ activities which help students to develop better.

Read the passage. Circle the best answer A, B, or C to each of the questions.

When the era of digital technology has bloomed all over the world, human beings have witnessed thousands of wonderful inventions which can be applied in a variety of fields. Among those, robots are considered as a brilliant human creativity and have been developed further to serve people. Shaped into human bodies, robots are machines built to do tasks. Normally, they can be controlled by built-in computers so that they can do a series of automatic actions. These human-like machines help us explore new places, and uncover the mystery of the deep and cold ocean which is very dangerous for a normal body. They seem to play an unlimited role not only in exploration, but in medical fields as well. In hospitals, they can do a wide range of jobs in cooperation with doctors to improve the health care system. For instance, robots can assist physicians remotely to check on patients and even inspect them. They can search around hospitals to collect information about the sick and transmit it to the doctors through a screen to help them interact efficiently. With cutting-edge technology they can even do an operation with a high level of accuracy under professionals’ control. Thanks to robotic assistants, medical workers can save time and save many lives from fatal diseases. It is believed that the number of robots applied in the medical industry will be expected to increase dramatically over the next few years.

What is the passage mainly about?

The litter and ___________ from factories lead human’s lives into danger.