填空题
If the measure of vaccine should fail, the only backup would be ______.
【参考答案】
antiviral drugs
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单项选择题
A.Library.B.Bookstore.C.Classroom.D.Hotel.
A.Library.
B.Bookstore.
C.Classroom.
D.Hotel.
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单项选择题
A.Wonderful.B.Not bad.C.Exciting.D.Awful.
A.Wonderful.
B.Not bad.
C.Exciting.
D.Awful.
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