单项选择题

What can be inferred about Prof. Clark

A．He has been unpredictable lately.
B．He is usually punctual.
C．He advised his students to wear watches to class.
D．He rarely notices when students are late.
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单项选择题
What does the woman mean
A．The man should have offered his assistance earlier.
B．She doesn’t need the man’s help.
C．She didn’t realize the boxes were empty.
D．She wants the man to move the boxes.
单项选择题
A．forB．atC．inD．since
A．for
B．at
C．in
D．since
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