Although robots will one day help with household chores, it will never completely replace human cleaners.
А NO CHANGE
B they
С he
D you

Match the description to the term. 1. textbooks conference usage 2. elements surround a word which clarify the meaning casual usage 3. the way in which english is used context 4. family and friends frozen usage 5. friends at a football game formal usage 6. teachers and employers intimate usage 7. making an appointment usage