It hasn’t been___whether food from cloned animals is really safe for humans to e

题干

It hasn’t been___whether food from cloned animals is really safe for humans to eat.

A．confirmed

B．considered

C．turned out

D．worked out

上一题下一题 0.4难度单项选择更新时间:2017-12-18 09:02:27

小学学科试题库

初中学科试题库

高中学科试题库