单项选择题

Cactus plants have spines that prevent animals from nibbling them.

A．ruining
B．reaching
C．climbing
D．gnawing
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单项选择题
There are notices to the contrary, a great deal of technical writing is at best awkward and at worst actually unclear.
A．denials
B．laws
C．attempts
D．ideas
单项选择题
What a juicy morsel it is
A．tidbit
B．savory
C．gossip
D．steak
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