单项选择题

A．Leave the children at home.
B．Let the children make their own amusement.
C．Arrange some games for the children.
D．Tell them to take some toys with them.
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单项选择题
A．Cold-blooded animals.B．Warm-blooded animals.C．Porcupines.D．Certain animals in Afric
A．Cold-blooded animals.
B．Warm-blooded animals.
C．Porcupines.
D．Certain animals in Afric
单项选择题
In the last paragraph, the author thinks that
A．it' s necessary to stitch the public interest in wrongheaded extremes
B．additional research on the ecological consequences of genetic engineering should put the public interest at the core
C．it' s necessary to establish new agencies to take responsibilities for testing the environmental consequences of agribiotech
D．to acknowledge the growing impact of the genetic engineering is to be ready for global disaster
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