问题
选择题
22. _____ computer has been proved to be _____ important aid in classroom teaching.
A．The; an
B．The; the
C．A; the
D．A; /
答案
答案：A
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22. _____ computer has been proved to be _____ important aid in classroom teaching.
A．The; an
B．The; the
C．A; the
D．A; /
答案：A