单项选择题

All _______ is a continuous supple of raw materials.

A．what is needed
B．thing needed
C．that is needed
D．is needed
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单项选择题
A．the othersB．all othersC．theseD．those
A．the others
B．all others
C．these
D．those
单项选择题
A．HoweverB．MoreoverC．ThoughD．Therefore
A．However
B．Moreover
C．Though
D．Therefore
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