What does the word "they" in line 1 of the fourth paragraph refer to?

Find the word which has a different sound in the part underlined.

Choose the word whose main stress is different from the others.

Choose the word which has a different stress pattern from the others.

Choose the best answer to complete the sentence.

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

Choose the correct word or phrase to complete the sentence.

Computers have become part of our daily lives. We visit shops, offices, and places of scenic beauty ___________the help of computers.

Choose the correct word or phrase to complete the sentence.

________ like going to pop concerts when you were teenager?

Choose the correct word or phrase to complete the sentence.

3-D printing ___________complex tools and components.