单项选择题

Within decades, PAN-type research will transform the Internet into the Life Net, a comprehensive （） environment for human habitation.

A．sensory
B．sensible
C．sensitive
D．sensational

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单项选择题

I never think of fall （） I think of the hardships I have experienced when I was a child.

A．that
B．when
C．but
D．and

单项选择题

After reviewing the troops, ______ visiting general commented that he had finally seen the kind of ______ soldier that the nation needs.（）

A．a... a
B．a... the
C．the... /
D．the.., the

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