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A
has
B
is having
C
is to have
D
is used to have
正确答案 :A
解析
本题考查英语语法——动词的时态。
句意“新技术已经使在线“虚拟图书馆”的发展成为可能。”此处强调对现在造成的结果或影响,也表示事情已经完成,应使用现在完成时。故A项符合题意。
B、C、D项为干扰选项,故排除。
故本题答案为A。
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