单项选择题

Having (finished) his term paper (before the deadline), (it was delivered) to the profes-sor (before) the class.

A．finished
B．before the deadline
C．it was delivered
D．before
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单项选择题
(Although) the danger that he might (be injured), Smith (bravely entered) the burning house (in order) to save the boy.
A．Although
B．be injured
C．bravely entered
D．in order
单项选择题
(On his way) to school yesterday morning, Prof. Wang (came across) an old friend and (stopped talking) with him for (quite a while).
A．On his way
B．came across
C．stopped talking
D．quite a while
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