单项选择题

Students find it difficult in distinguishing some English words as there is only difference between them.

A．feeble
B．invariable
C．plausible
D．subtle
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单项选择题
The information superhighway has _________ solutions to people's needs to contact others quickly and conveniently.
A．lived up to
B．come up with
C．faced up to
D．gone in for
单项选择题
The __________ disease has gone out of control in that densely populated area.
A．infectious
B．vicious
C．abrupt
D．transient
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