单项选择题

Our research has focused on a drug which is so ______ as to be able to change brain chemistry.

A．influential
B．powerful
C．monstrous
D．rigorous
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单项选择题
No hero of ancient or modern times can surpass the Indian with his lofty contempt of death and the ______ with which he sustained the cruelest afflication.
A．assent
B．fortitude
C．concern
D．reverance
单项选择题
As an ______ part of China, Kongkong returned to the embrace of its motherland in July, 1997.
A．explicit
B．oriented
C．integral
D．optimal
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