单项选择题

The development of these gene technologies may be far in the future, but the moral and social issues raised by them should be discussed, for once a technology has been, it may be difficult to stop or control.

A． democratically… freed
B． presently … invented
C． summarily… contested
D． seriously… veiled
E． hesitantly… ignored

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单项选择题

单项选择题

The development of these gene technologies may be far in the future, but the moral and social issues raised by them should be discussed______, for once a technology has been______, it may be difficult to stop or control.