Some scientists think that it may take ______ years to make robots look like people, and do the same things as us.

To improve your spoken English, you’d better listen to the tape ______.

Doing homeworkmost of my time on Saturdays.

Do you know the man wearing a pair of glasses?—Yes. He’s a teacher of ________. He teaches ________ History.

Why would some workers in Foxcon die _____ continue working in the factory? — Psychologists say they are under too much pressure. [ ]