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Over the past few years medical researchers______for a means of controlling the virus.
Over the past few years medical researchers______for a means of controlling the virus.
admin
2012-05-24
74
问题
Over the past few years medical researchers______for a means of controlling the virus.
选项
A、have searching
B、are searching
C、have been searching
D、search
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/6wGC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
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