21.Why is America facing its worst nurse shortage?
A. Because the demand of nurses has been doubled.
B. Because more and more women prefer to be teachers and doctors.
C. Because women have been provided with many different jobs.
D. Because women no longer choose to be nurses.
22.The passage tells us that high school teachers are at fault for________.
A. not mentioning the worst nurse shortage in the US
B. introducing jobs with higher pay and greater status to their students
C. not asking the government to raise the nurses’ payment
D. persuading the students not to be nurses
23.The author wrote this passage in order to________.
A. describe the unequal treatment of women in the US
B. warn people to pay more attention to the nursing problem
C. tell us women’s free choice of jobs today
D. call on women not to be nurses