scientists
                    - .Many scientists believe that now we can study the behavior of a three-year-old child to see ____ they will grow up to be criminals.
 - Scientists say it may be five or six years ____ it is possible to test this medicine on human patients.
 - Scientists say it may be five or six years _____ it is possible to test this medicine to human patients.
 - Scientists say it may be five or six years ______ it is possible to test this medicine on human patients.
 - Scientists say it may be five or six years_______it is possible to test this medicine on human patients.
 - Some scientists believe that is no doubt a cure for AIDS will be found.
 - Scientists are now working _ humanoids(类人生物) because they can help people alot. [ ]
 - Scientists can make the robots __________.
 - Scientists are trying to ways to treat the terrible disease called H7N9.
 - scientists have done a lot of research on A (H1N1) flu, there are still some cases for further study.[ ]
 
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