单项选择题

A．Wait for the lecture to begin.
B．Go immediately to their seats.
C．Get something to drink first.
D．Sit down and enjoy the lecture.
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单项选择题
A．He may see Alan in Italy.B．He was looking for Alan in the library.C．He’’s not sure which way to go.D．He may have made a mistake.
A．He may see Alan in Italy.
B．He was looking for Alan in the library.
C．He’’s not sure which way to go.
D．He may have made a mistake.
单项选择题
A spear or a robot has the quality of technology only when it______.
A．is used both as a cultural and a physical object
B．serves different purposes equally well
C．is utilized by man
D．can be of use to both man and animal
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