Normally, it takes the college students 4 years to obta...
单项选择题Normally, it takes the college students 4 years to obtain their bachelor’s degrees, 1.5 or 2 years for their master’s degrees, and _____________ for their doctoral degrees in America.
A．2 to 4 years
B．3 to 5 years
C．4 to 6 years
D．5 to 7 years
