单项选择题

Starfish (cling to) stones by the suction of their innumerable tube feet.

A．attract
B．destroy
C．swim over to
D．hold fast to
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单项选择题
The land crab, a forest-floor scavenger native to tropical America, migrates to the water to (breed).
A．die
B．swim
C．mate
D．hatch
单项选择题
Capital punishment was (abolished) some years ago in some states of the U. S.
A．created
B．decorated
C．improved
D．eliminated
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