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
What best expresses Jeremy Rifkin's attitude toward designing babies through gene therapy
A．Strongly supportive.
B．Cautiously welcome.
C．Uncommitted.
D．Critical.
单项选择题
From the passage we know that ______.
A．designing babies may bring people a lot of ethical concerns
B．designing babies is purely scientific not to cause ethical problems
C．the prospect of designing babies has caused criticism from communities
D．people are concerned about the harm done to science by designing babies
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