Hannah ________me; otherwise, other students wouldn't have known my result of the quiz. [ ]
A.
may betray
B.
must betray
C.
must have betrayed
D.
should betray
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参考答案:
举一反三
【单选题】2 “While the increase in carbon dioxide in the atmosphere is the main effect of global warming, there are other effects as well. For example, there is a marked increase in infectious diseases that hav...