Questions 1/4
They are the engineers that designed the new-type machine.
Questions 2/4
That is the poor little boy who has no playmates of his age living nearby and has to go to school by himself.
Questions 3/4
The relations between China and the United States of America have been improved, which will contribute to world peace.
Questions 4/4
Electronic computers, which have many advantages, can not carry out creative work and replace man.