--Can you use chopsticks, John? --_________. I once stayed in China for two years.
6. He had thousands of students, many of ______ gained great success in their own field.
I met the fruit-pickers, several of _______ were still university students.
Her sons, both of ______ work abroad, will come back home this summer.
George, with _______ I played tennis on Sundays, was a warm-hearted person.
(3) This I did at nine o’clock, after _______ I sat reading the paper.