题目内容

What eye color would they______?

A. prefer
B. premiere
C. prime
D. peak

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But recent progress in genetic________has led some scientists to believe that the day is approaching.

A. engine
B. engineer
C. engineering
D. engineers

Not everyone working in the field of genetics believes that parents will be_______such choices anytime soon.

A. make
B. making
C. made
D. maded

Why might some parents want to know the gender of their child before it is _______?

A. borning
B. born
C. burn
D. burning

The use of genetic engineering should be restricted______just those cases.

A. around
B. at
C. on
D. to