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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热门试题

单项选择题

A、 trained in
B、 averse to
C、 unprepared for
D、 beholden to
E、 neutral toward

单项选择题

A、 silently… conspicuous
B、 painlessly… euphemized
C、 guilelessly … unknown
D、 obtrusively… cunning
E、 slyly … incommunicado

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.（）