A． With the development of science and technology, we o...
单项选择题
A． With the development of science and technology, we often don’t need to pay for health care until the bill comes.
B． With the development of science and technology, health care is usually not painful, but it has become more expensive.
C． With the development of science and technology, health care is usually free of charge.
D． With the development of science and technology, health care has become more and more convenient.
