overtime. After questioning 1., 000 mothers with children under 18., it found that., on most days., mums started their routine work at 7am and finished at around 11pm.

　　To calculate just how much mothers would earn from that labour., it suggested some of the roles that mums could take on., including housekeeper., part-time lawyer., personal trainer and entertainer. Being a part-time lawyer., at ￡48. 98 an hour., would prove to be the most profitable of the"mum jobs"., with psychologist(心理学家)a close second.

　　It also asked mothers about the challenges they face., with 80 per cent making emotional(情感的)demand as the hardest thing about motherhood.

　　Over a third of mums felt they needed more training and around half said they missed going out with friends.

　　The study shows mothers matter all year long and not just on Mother's Day. The emotional., physical and mental energy mothers devote to their children can be never-ending., but children are also sources of great joy and happiness. Investing(投入)in time for parenting and raising relationships is money well spent.

4. How much would a mother earn a year if working as the Prime Minister?

　A. ￡30., 000. B. ￡142., 000. C. ￡172., 000. D. ￡202., 000.

5. The biggest challenge for most mothers is from　　　.

　A. emotional demand B. low pay for work

　C. heavy workload D. lack of training

6. What is stressed in the last paragraph?

　A. Mothers' importance shows in family all year long.

　B. The sacrifices mothers make are huge but worthwhile.

　C. Mothers' devotion to children can hardly be calculated.

　D. Investing time in parenting would bring a financial return.

7. What can we conclude from the study?

　A. Mothers' working hours should be largely reduced.

B. Mothers should balance their time for work and rest.