With the development of science,more new technology ______ to the field of information technologya、has introducedb、is being introducedc、is introducedd、was introduced
问题描述：
With the development of science,more new technology ______ to the field of information technology
a、has introduced
b、is being introduced
c、is introduced
d、was introduced
答
b
一要考虑到被动语态、二要考虑到进行时态