D. Robots worked well for General Motors, but caused certain trouble to others. Choose the correct answer to each of the following questions. Question 27. Samsung __ by those who have bought them for technical faults. A. has all Galaxy Note 7 returned B. has all Galaxy Note 7 to returned C. made all Galaxy Note 7 return D. made all Galaxy Note 7 returned Question 28. Experts believe that in the near future humans __ A. have robots do the housework B. have had the housework done by robots C. will do the housework by robots D. will have robots do the housework Question 29. My brother pursued higher education __ he could get a better job. A. not only B. so that C. either D. even though Question 30. Working the night __ at the hospital can be very tiring for some nurses. A. overtime B. shift C. bonus D. qualification Question 31. __ you are proficient in Japanese, you will stand a better chance of getting the job. A. However B. Although C. While D. Because