问题
选择题
A lot of new technology _____ into schools to make learning more effective these years. [ ]
A. introduced
B. has introduced
C. was introduced
D. is being introduced
答案
答案：D
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A lot of new technology _____ into schools to make learning more effective these years. [ ]
A. introduced
B. has introduced
C. was introduced
D. is being introduced
答案：D