单项选择题

The young chemist is ______ experiments in much the same way that his instructor used to do.

A．reforming
B．conducting
C．prompting
D．participating
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单项选择题
A primary school teacher can not take it for granted that his pupils always do their homework ______.
A．as follows
B．as required
C．as goes
D．as is well known
单项选择题
Which of the following can best sum up the passage
A．Legal and ethical problems of organ transplantation.
B．Some underlying principles on organ transplantation.
C．The diagnosis of death before organ transplantation.
D．The difference between compulsory postmortem exam and organ transplantation.
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