单项选择题


A．The man has already spoken to Professor Wang.
B．Professor Wang will probably excuse the man’s absence.
C．The man has never missed Professor Wang’s class.
D．Professor Wang is not in class today.
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单项选择题
A．People can spray coniine oxide on their car engines easily.B．The material works as a pollution filter.C．The material saves fuel for it reflects back the heat of burning fuel.D．When burnt, the material will save fuel.
A．People can spray coniine oxide on their car engines easily.
B．The material works as a pollution filter.
C．The material saves fuel for it reflects back the heat of burning fuel.
D．When burnt, the material will save fuel.
单项选择题
A．The online program is more convenient.B．The online program costs less.C．The online program requires high technology.D．The online program offers no supervision for a person’s study.
A．The online program is more convenient.
B．The online program costs less.
C．The online program requires high technology.
D．The online program offers no supervision for a person’s study.
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