单项选择题

According to the passage, what can scientists do now with the genetic testing technology

A．Prescreen a baby's sex.
B．Screen babies for desirable attributes.
C．Insert genes parents want.
D．Craft genes in a la
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单项选择题
A．butB．exceptC．withD．besides
A．but
B．except
C．with
D．besides
单项选择题
What does the author mean when he says They will have a bit of time (Par
A．5)A. Designer babies will soon be a reality in the near future.B. Nature will be altered by designer babies.C. There is no need at the moment to be too worried about designer babies.D. Scientists are working against time to design babies
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